Iris Door Box v4

This is a rework of Countspatula's Iris Door Box.
It's designed in FreeCAD and completely parameterised.
There's a small manual within the FreeCAD file with some explanations about the parameters.

Some of the design aspects have been changed:
- The functionality of the ring and the base are swapped.
- The leaves are made out of 2 parts, a top and a bottom, that are positioned at an offset so they support each other.
- The cut-outs in the leaves lock them in open and closed position.

The screws in the picture are covered with the screw caps I posted before.