- The holes provided for wall/ceiling mounting do not match either the US 2-3/4" or 3-1/2" ceiling box mounting holes.
- The rotary mounting plate has a release lever that is almost impossible to access, once it is mounted on the ceiling, as the level is almost flush with the bottom of the access point.
I created, based on the work of several other folks, a US ceiling mount adapter, with a 20mm relief height, and posted it on Thingiverse:
This is a simple part, created in OpenSCAD, but I am inordinately proud of it, as it is the first 3D printed part that I have created, without any outside assistance.
I'll probably talk more about 3D printing, in the future. I recently acquired a used Prusa i3 Mk2 printer, and have been highly satisfied with it.