Access Panel - Rectangular

Removable access panel to allow easy in-wall access.

Fully configurable.
You can choose inches or millimeters when specifying most dimensions.
Print thickness is still in mm.

I used OpenSCAD to design this.

2023-06-03 Update:
Added a V2 version that produces almost the same thing, but with more rounded edges on the inside and a different way of creating the inner walls.