The adapter is a 3D printed part to add an (optional) color filter and a diffusor cap to the Fenix LR40R. You can glue everything together and put the adapter on the Fenix on demand with a bit of pressure. An indentation in the adapter keeps the ideal position of the adapter. Some openings help heat dissipation.
And I don't need glue at all. Tolerances are so good that everything holds together well without...
Disclaimer: First FreeCAD project, last CAD experience (Solid Edge) now some years in the past... I remember that there was an easy way for hole patterns...
| without diffusor |
|---|
 |
| with diffusor |
|---|
 |
The LR40R outer diameter at the top end is 79.2 mm.
(39.6 mm radius * 2)
Cutout of #205 filter: amazon.de
The white cap of this one: amazon.de
Print it yourself, FreeCAD project, .stl and .gcode is in the repository.
If you don't have access to a 3D printer contact me, maybe we can arrange something.