diff --git a/crates/ui-egui/src/scenario.rs b/crates/ui-egui/src/scenario.rs
index 17ee4a99..47e262cc 100644
--- a/crates/ui-egui/src/scenario.rs
+++ b/crates/ui-egui/src/scenario.rs
@@ -27,6 +27,8 @@
 //!   `{"dimension": "d1"}` or `{"handle": "arrow"}` (a manipulator handle: see [`publish_handle`])
 //! - `{"autosave": true}`: autosave into the scenario's recovery folder; `{"restart": "crash" |
 //!   "close"}`: the app dies (or closes) and a new one starts on the same folders
+//! - `{"script": "examples/…/x.json"}`: run a command script through the engine; `"$DIR"` in a
+//!   `call` step's string parameters is the scenario's folder
 //! - `{"note": "…"}`: a comment; `{"pending": "why"}`: the scenario waits for a fix (its test
 //!   is ignored)
 //! - `{"expect": {…}}`: checks, see [`check`]; `{"until": {…}}` waits (frames) until they pass
@@ -95,6 +97,16 @@ pub fn clear_handles() {
     COUNTS.with(|h| h.borrow_mut().clear());
 }
 
+/// `v` with "$DIR" in its strings replaced by `dir`.
+fn with_dir(v: Value, dir: &str) -> Value {
+    match v {
+        Value::String(t) => Value::String(t.replace("$DIR", dir)),
+        Value::Array(a) => Value::Array(a.into_iter().map(|x| with_dir(x, dir)).collect()),
+        Value::Object(o) => Value::Object(o.into_iter().map(|(k, x)| (k, with_dir(x, dir))).collect()),
+        other => other,
+    }
+}
+
 /// A fresh folder for one scenario's files.
 fn scratch_dir() -> PathBuf {
     use std::sync::atomic::{AtomicUsize, Ordering};
@@ -363,8 +375,24 @@ impl Harness {
                     return Err(format!("{m} was answered after {frames} frames: the agent cursor did not act it out ({min})"));
                 }
                 v
+            } else if let Some(f) = s.get("script").and_then(Value::as_str) {
+                // A command script (`{"commands": [{command, params}]}`, path from the repository
+                // root) run through the engine, as `solvecraft-cli run` does.
+                let path = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../..").join(f);
+                let text = std::fs::read_to_string(&path).map_err(|e| format!("{f}: {e}"))?;
+                let v: Value = serde_json::from_str(&text).map_err(|e| format!("{f}: {e}"))?;
+                for (i, c) in v["commands"].as_array().into_iter().flatten().enumerate() {
+                    let r = self.call("engine.execute", json!({"command": c["command"], "params": c.get("params").cloned().unwrap_or(json!({}))}));
+                    if r["ok"] != true {
+                        return Err(format!("{f}: step {} ({}): {}", i + 1, c["command"], r["error"]));
+                    }
+                }
+                self.frames(2);
+                return Ok(());
             } else if let Some(m) = s.get("call").and_then(Value::as_str) {
-                self.call(m, s.get("params").cloned().unwrap_or(json!({})))
+                // "$DIR" in a string parameter is the scenario's folder.
+                let params = with_dir(s.get("params").cloned().unwrap_or(json!({})), &self.dir.to_string_lossy());
+                self.call(m, params)
             } else if s.get("note").is_some() || s.get("pending").is_some() {
                 return Ok(());
             } else if let Some(name) = s.get("shot").and_then(Value::as_str) {
diff --git a/crates/ui-egui/tests/scenarios/acceptance_lid_lip_after_resize.json b/crates/ui-egui/tests/scenarios/acceptance_lid_lip_after_resize.json
new file mode 100644
index 00000000..0da30c42
--- /dev/null
+++ b/crates/ui-egui/tests/scenarios/acceptance_lid_lip_after_resize.json
@@ -0,0 +1,27 @@
+[
+ {
+  "pending": "#40: offsets of projected geometry get new ids on recompute, the lid's lip fails"
+ },
+ {
+  "note": "Acceptance (#27): the board grows 60 \u2192 70 mm; the lid's lip (offsets of the case's projected rim) follows."
+ },
+ {
+  "script": "examples/acceptance/sensor_enclosure.json"
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "board_w",
+    "expression": "70 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ }
+]
diff --git a/crates/ui-egui/tests/scenarios/acceptance_lip_on_rounded_rim.json b/crates/ui-egui/tests/scenarios/acceptance_lip_on_rounded_rim.json
new file mode 100644
index 00000000..c2098168
--- /dev/null
+++ b/crates/ui-egui/tests/scenarios/acceptance_lip_on_rounded_rim.json
@@ -0,0 +1,33 @@
+[
+ {
+  "pending": "#29: Plastic Lip fails on a rounded (filleted) shelled rim"
+ },
+ {
+  "note": "Acceptance (#27): a lip on the case's rounded rim with the Lip command."
+ },
+ {
+  "script": "examples/acceptance/sensor_enclosure.json"
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "plastic.lip",
+   "params": {
+    "face": [
+     0,
+     29,
+     25
+    ],
+    "width": 1,
+    "height": 1.5,
+    "body": "Case"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ }
+]
diff --git a/crates/ui-egui/tests/scenarios/acceptance_pattern_of_suppressed_feature.json b/crates/ui-egui/tests/scenarios/acceptance_pattern_of_suppressed_feature.json
new file mode 100644
index 00000000..898c0d0b
--- /dev/null
+++ b/crates/ui-egui/tests/scenarios/acceptance_pattern_of_suppressed_feature.json
@@ -0,0 +1,29 @@
+[
+ {
+  "pending": "#42: suppressing a patterned feature keeps the pattern's copies"
+ },
+ {
+  "note": "Acceptance (#27): suppressing the PCB standoff takes the patterned copies with it."
+ },
+ {
+  "script": "examples/acceptance/sensor_enclosure.json"
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "timeline.suppress",
+   "params": {
+    "feature": "Standoff",
+    "suppressed": true
+   }
+  }
+ },
+ {
+  "expect": {
+   "body_volume": {
+    "body": "Case",
+    "volume": 24934.4
+   }
+  }
+ }
+]
diff --git a/crates/ui-egui/tests/scenarios/acceptance_sensor_enclosure.json b/crates/ui-egui/tests/scenarios/acceptance_sensor_enclosure.json
new file mode 100644
index 00000000..30f04daa
--- /dev/null
+++ b/crates/ui-egui/tests/scenarios/acceptance_sensor_enclosure.json
@@ -0,0 +1,145 @@
+[
+ {
+  "note": "Acceptance (#27): the sensor enclosure built from examples/acceptance/sensor_enclosure.json, then edited: the USB cut-out moved, the height changed, features suppressed and back, saved and reopened, exported to STEP and read back."
+ },
+ {
+  "script": "examples/acceptance/sensor_enclosure.json"
+ },
+ {
+  "call": "ui.view",
+  "params": {
+   "view": "home"
+  }
+ },
+ {
+  "expect": {
+   "bodies": 2,
+   "errors": 0,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25401.7
+   }
+  }
+ },
+ {
+  "expect": {
+   "body_volume": {
+    "body": "Lid",
+    "volume": 19629.7
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "usb_offset",
+    "expression": "15 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25401.7
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "timeline.suppress",
+   "params": {
+    "feature": "SnapFit1",
+    "suppressed": true
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25340.5
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "timeline.suppress",
+   "params": {
+    "feature": "SnapFit1",
+    "suppressed": false
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25401.7
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "file.save_as",
+   "params": {
+    "path": "$DIR/enclosure.solvecraft"
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "doc.open",
+   "params": {
+    "path": "$DIR/enclosure.solvecraft"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25401.7
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "file.export",
+   "params": {
+    "path": "$DIR/enclosure.step"
+   }
+  }
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "doc.open",
+   "params": {
+    "path": "$DIR/enclosure.step"
+   }
+  }
+ },
+ {
+  "expect": {
+   "bodies": 2,
+   "body_volume": {
+    "body": "Case",
+    "volume": 25401.7
+   }
+  }
+ }
+]
diff --git a/crates/ui-egui/tests/scenarios/acceptance_snap_fit_after_resize.json b/crates/ui-egui/tests/scenarios/acceptance_snap_fit_after_resize.json
new file mode 100644
index 00000000..d2d51a42
--- /dev/null
+++ b/crates/ui-egui/tests/scenarios/acceptance_snap_fit_after_resize.json
@@ -0,0 +1,44 @@
+[
+ {
+  "pending": "#41: a snap fit stays at its old point when its wall moves (a floating body)"
+ },
+ {
+  "note": "Acceptance (#27): the board grows 40 \u2192 50 mm deep; the snap fit stays on the moved front wall."
+ },
+ {
+  "script": "examples/acceptance/sensor_enclosure.json"
+ },
+ {
+  "call": "engine.execute",
+  "params": {
+   "command": "parameters.change",
+   "params": {
+    "name": "board_d",
+    "expression": "50 mm"
+   }
+  }
+ },
+ {
+  "expect": {
+   "errors": 0,
+   "bodies": 2
+  }
+ },
+ {
+  "expect": {
+   "bbox": {
+    "body": "Case",
+    "min": [
+     -40,
+     -35,
+     0
+    ],
+    "max": [
+     40,
+     35,
+     25
+    ]
+   }
+  }
+ }
+]
diff --git a/examples/acceptance/sensor_enclosure.json b/examples/acceptance/sensor_enclosure.json
new file mode 100644
index 00000000..12cef4ed
--- /dev/null
+++ b/examples/acceptance/sensor_enclosure.json
@@ -0,0 +1,772 @@
+{
+ "description": "Acceptance project (#27): a sensor enclosure for a 60 x 40 mm board. A case (rounded, shelled, a USB cut-out on the front wall, 4 PCB standoffs and 4 lid bosses patterned from one each, a snap fit) and a lid (a lip made from offsets of the case's inner rim, 4 screw holes patterned from one). Everything is sized from the user parameters: board_w, board_d, gap (board to inner wall), wall, height, standoff_h, hole_inset, usb_offset, lid_h.",
+ "commands": [
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "board_w",
+    "expression": "60 mm",
+    "comment": "PCB length"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "board_d",
+    "expression": "40 mm",
+    "comment": "PCB width"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "gap",
+    "expression": "8 mm",
+    "comment": "PCB to inner wall"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "wall",
+    "expression": "2 mm"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "height",
+    "expression": "25 mm"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "standoff_h",
+    "expression": "5 mm"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "hole_inset",
+    "expression": "3.5 mm",
+    "comment": "PCB mounting hole from its edge"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "usb_offset",
+    "expression": "10 mm",
+    "comment": "USB connector centre, left of the middle"
+   }
+  },
+  {
+   "command": "parameters.change",
+   "params": {
+    "name": "lid_h",
+    "expression": "4 mm"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": "XY",
+    "name": "Outline"
+   }
+  },
+  {
+   "command": "sketch.rectangle.center",
+   "params": {
+    "center": [
+     0,
+     0
+    ],
+    "corner": [
+     40,
+     30
+    ]
+   }
+  },
+  {
+   "command": "sketch.constraint.coincident",
+   "params": {
+    "a": "p5",
+    "b": "origin"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l1"
+    ],
+    "value": "board_w + 2 * (gap + wall)"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l2"
+    ],
+    "value": "board_d + 2 * (gap + wall)"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "distance": "height",
+    "body_name": "Case"
+   }
+  },
+  {
+   "command": "solid.fillet",
+   "params": {
+    "edges": [
+     [
+      40,
+      30,
+      12.5
+     ],
+     [
+      -40,
+      30,
+      12.5
+     ],
+     [
+      -40,
+      -30,
+      12.5
+     ],
+     [
+      40,
+      -30,
+      12.5
+     ]
+    ],
+    "radius": 4
+   }
+  },
+  {
+   "command": "solid.shell",
+   "params": {
+    "faces": [
+     [
+      0,
+      0,
+      25
+     ]
+    ],
+    "thickness": "wall"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": {
+     "face": [
+      5,
+      -7,
+      2
+     ]
+    },
+    "name": "PCB standoff"
+   }
+  },
+  {
+   "command": "sketch.circle.center",
+   "params": {
+    "center": [
+     -26.5,
+     -16.5
+    ],
+    "diameter": 6,
+    "id": "so"
+   }
+  },
+  {
+   "command": "sketch.circle.center",
+   "params": {
+    "center": "so.center",
+    "diameter": 2.5,
+    "id": "so_hole"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "so.center"
+    ],
+    "type": "horizontal",
+    "value": "board_w / 2 - hole_inset"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "so.center"
+    ],
+    "type": "vertical",
+    "value": "board_d / 2 - hole_inset"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "so"
+    ],
+    "type": "diameter",
+    "value": "6 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "so_hole"
+    ],
+    "type": "diameter",
+    "value": "2.5 mm"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "profiles": [
+     [
+      "so"
+     ]
+    ],
+    "distance": "standoff_h",
+    "operation": "join",
+    "name": "Standoff"
+   }
+  },
+  {
+   "command": "solid.pattern.rectangular",
+   "params": {
+    "features": [
+     "Standoff"
+    ],
+    "dir1": [
+     1,
+     0,
+     0
+    ],
+    "count1": 2,
+    "spacing1": "board_w - 2 * hole_inset",
+    "dir2": [
+     0,
+     1,
+     0
+    ],
+    "count2": 2,
+    "spacing2": "board_d - 2 * hole_inset"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": {
+     "face": [
+      0,
+      -30,
+      12
+     ]
+    },
+    "name": "USB"
+   }
+  },
+  {
+   "command": "sketch.rectangle.center",
+   "params": {
+    "center": [
+     -10,
+     12
+    ],
+    "corner": [
+     -5.5,
+     13.75
+    ]
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l5"
+    ],
+    "value": "9 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l6"
+    ],
+    "value": "3.5 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "p9"
+    ],
+    "type": "horizontal",
+    "value": "usb_offset"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "p9"
+    ],
+    "type": "vertical",
+    "value": "wall + standoff_h + 1.6 mm + 1.75 mm"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "profiles": [
+     [
+      "l5",
+      "l6",
+      "l7",
+      "l8"
+     ]
+    ],
+    "distance": "-(wall + 1 mm)",
+    "operation": "cut",
+    "name": "USB cut"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": {
+     "face": [
+      5,
+      -7,
+      2
+     ]
+    },
+    "name": "Lid boss"
+   }
+  },
+  {
+   "command": "sketch.circle.center",
+   "params": {
+    "center": [
+     -34.5,
+     -24.5
+    ],
+    "diameter": 7,
+    "id": "bs"
+   }
+  },
+  {
+   "command": "sketch.circle.center",
+   "params": {
+    "center": "bs.center",
+    "diameter": 2.5,
+    "id": "bs_hole"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "bs.center"
+    ],
+    "type": "horizontal",
+    "value": "board_w / 2 + gap - 4.5 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "bs.center"
+    ],
+    "type": "vertical",
+    "value": "board_d / 2 + gap - 4.5 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "bs"
+    ],
+    "type": "diameter",
+    "value": "7 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "bs_hole"
+    ],
+    "type": "diameter",
+    "value": "2.5 mm"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "profiles": [
+     [
+      "bs"
+     ]
+    ],
+    "distance": "height - wall",
+    "operation": "join",
+    "name": "Lid boss"
+   }
+  },
+  {
+   "command": "solid.pattern.rectangular",
+   "params": {
+    "features": [
+     "Lid boss"
+    ],
+    "dir1": [
+     1,
+     0,
+     0
+    ],
+    "count1": 2,
+    "spacing1": "board_w + 2 * gap - 9 mm",
+    "dir2": [
+     0,
+     1,
+     0
+    ],
+    "count2": 2,
+    "spacing2": "board_d + 2 * gap - 9 mm"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": "XY",
+    "offset": "height",
+    "name": "Lid outline"
+   }
+  },
+  {
+   "command": "sketch.rectangle.center",
+   "params": {
+    "center": [
+     0,
+     0
+    ],
+    "corner": [
+     40,
+     30
+    ]
+   }
+  },
+  {
+   "command": "sketch.constraint.coincident",
+   "params": {
+    "a": "p5",
+    "b": "origin"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l1"
+    ],
+    "value": "board_w + 2 * (gap + wall)"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "l2"
+    ],
+    "value": "board_d + 2 * (gap + wall)"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "distance": "lid_h",
+    "operation": "new",
+    "body_name": "Lid",
+    "name": "Lid"
+   }
+  },
+  {
+   "command": "solid.fillet",
+   "params": {
+    "edges": [
+     [
+      40,
+      30,
+      27
+     ],
+     [
+      -40,
+      30,
+      27
+     ],
+     [
+      -40,
+      -30,
+      27
+     ],
+     [
+      40,
+      -30,
+      27
+     ]
+    ],
+    "radius": 4,
+    "body": "Lid"
+   }
+  },
+  {
+   "command": "plastic.snap_fit",
+   "params": {
+    "position": [
+     0,
+     -28,
+     20
+    ],
+    "hook": [
+     0,
+     0,
+     1
+    ],
+    "length": 8,
+    "thickness": 1.2,
+    "width": 6,
+    "catch_depth": 0.8,
+    "catch_length": 1.5,
+    "body": "Case"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": {
+     "face": [
+      0,
+      0,
+      25
+     ]
+    },
+    "name": "Lid lip"
+   }
+  },
+  {
+   "command": "sketch.project",
+   "params": {
+    "refs": [
+     {
+      "face": [
+       0,
+       29,
+       25
+      ],
+      "body": "Case"
+     }
+    ]
+   }
+  },
+  {
+   "command": "sketch.offset",
+   "params": {
+    "curves": [
+     "l9"
+    ],
+    "distance": 0.2,
+    "side": [
+     0,
+     0
+    ]
+   }
+  },
+  {
+   "command": "sketch.offset",
+   "params": {
+    "curves": [
+     "l9"
+    ],
+    "distance": 1.4,
+    "side": [
+     0,
+     0
+    ]
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "sketch": "Lid lip",
+    "profiles": [
+     [
+      "l13",
+      "a13",
+      "l14",
+      "a14",
+      "l15",
+      "a15",
+      "l16",
+      "a16"
+     ]
+    ],
+    "distance": "2 mm",
+    "operation": "join",
+    "targets": [
+     "Lid"
+    ],
+    "name": "Lid lip"
+   }
+  },
+  {
+   "command": "sketch.create",
+   "params": {
+    "plane": {
+     "face": [
+      5,
+      -7,
+      29
+     ]
+    },
+    "name": "Lid screw"
+   }
+  },
+  {
+   "command": "sketch.circle.center",
+   "params": {
+    "center": [
+     -33.5,
+     -23.5
+    ],
+    "diameter": 3.2,
+    "id": "ls"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "ls.center"
+    ],
+    "type": "horizontal",
+    "value": "board_w / 2 + gap - 4.5 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "origin",
+     "ls.center"
+    ],
+    "type": "vertical",
+    "value": "board_d / 2 + gap - 4.5 mm"
+   }
+  },
+  {
+   "command": "sketch.dimension",
+   "params": {
+    "entities": [
+     "ls"
+    ],
+    "type": "diameter",
+    "value": "3.2 mm"
+   }
+  },
+  {
+   "command": "sketch.finish",
+   "params": {}
+  },
+  {
+   "command": "solid.extrude",
+   "params": {
+    "profiles": [
+     [
+      "ls"
+     ]
+    ],
+    "through_all": true,
+    "direction": "negative",
+    "operation": "cut",
+    "targets": [
+     "Lid"
+    ],
+    "name": "Lid screw"
+   }
+  },
+  {
+   "command": "solid.pattern.rectangular",
+   "params": {
+    "features": [
+     "Lid screw"
+    ],
+    "dir1": [
+     1,
+     0,
+     0
+    ],
+    "count1": 2,
+    "spacing1": "board_w + 2 * gap - 9 mm",
+    "dir2": [
+     0,
+     1,
+     0
+    ],
+    "count2": 2,
+    "spacing2": "board_d + 2 * gap - 9 mm"
+   }
+  }
+ ]
+}