Execution: the supplied index.html and scene.js run in the pinned Three.js 0.180.0 environment, served locally. Browser console has no errors or warnings. Independent measurements of the rendered scene pass at 900/1200/1600 mm, with maximum dimension/position error below 0.001 mm. Colour changes and the 0.25 m exploded offset work. Ten cycles of length changes, explode, colour and reset retain five geometries and zero textures.

Two failed requirements remain:
1. At the required 390x844 viewport, the controls obscure the upper bench and the bench is clipped past the left and right edges. The attached mobile screenshot is the original/default state after Reset. The object must be inspectable alongside usable controls at both required viewport sizes, including the full slider range and exploded view.
2. Reset does not reliably restore the saved camera when clicked immediately after orbiting. Before orbit, the camera was {"position": [2.0000000000000004, 1.6000000000000003, 2.0000000000000004], "quaternion": [-0.23519196760911856, 0.3700756826972282, 0.0974197027449106, 0.8934417322721304]}. After dragging the canvas and pressing Reset once, then allowing motion to settle, it was {"position": [0.8700069956633917, 2.1526346738120306, 2.273598862728194], "quaternion": [-0.3482741707541531, 0.16993898789814604, 0.06435915056080511, 0.9196106470222888]}. No further pointer input was made. Reset must restore the original camera and stop residual movement.

Please fix these observed issues while preserving all passing geometry, slider range, colour, resource disposal and keyboard requirements. Return complete changed index.html and scene.js source, not only a diff. Do not claim you executed the files.
