Things i’ve learnt… some sizes.

The base clippy bit is 44mm square 9mm tall with a chamfer of 9mm by 4.5mm. (This is good for printing of 3D printers.)

And then that’s attached to a plate of size 66mm, 51mm, 4.8mm like so

A couple more holes for the 1/4-20 UNC threaded screws, round some corners and bingo a camera plate (upside down).

I’ll stick the OpenSCAD on github.com/crazy-logic