{"commands": [
 {"command": "parameters.change", "params": {"name": "wall", "expression": "2 mm"}},
 {"command": "solid.box", "params": {"length": 80, "width": 50, "height": 30}},
 {"command": "solid.shell", "params": {"faces": [[40, 25, 30]], "thickness": "wall"}},
 {"command": "plastic.lip", "params": {"face": [1, 25, 30], "width": 1, "height": 2}},
 {"command": "plastic.boss", "params": {"position": [20, 20, 2], "diameter": 6, "height": 10, "hole_diameter": 2.5, "draft": "1 deg"}},
 {"command": "plastic.rest", "params": {"position": [60, 30, 2], "width": 8, "length": 12, "height": 3, "thickness": 1}},
 {"command": "plastic.snap_fit", "params": {"position": [40, 12, 2], "direction": [0, 0, 1], "hook": [0, 1, 0], "length": 12, "thickness": 1.5, "width": 6, "catch_depth": 1, "catch_length": 2}},
 {"command": "plastic.manage_rules", "params": {"name": "ABS (1.5mm)", "active": true}}
]}