This is a fun little project inspired by Ligero69. Though it's not a remix, but it's designed from scratch.
DISCLAIMER: Modifications to the camera are not reversible (you need to cut things). Do it at your own risk.
HOWTO, in short:
1) Gut the camera and completely remove original lens and the self-timer knob. Keep the inner-most light blocking baffle. It's attached to the camera body, not the lens, and helps blocking stray light.
2) Cut the lens opening as wide as possible, but keeping its original height - it serves as a light block. Also cut off the bulge that houses on-off trigger on the lens housing.
3) Glue on the plug for self-timer knob.
4) Print the adapter. It's best to use a black carbon-filled filament. The pictures show a prototype.
5) Using the printed adapter as a guide, drill in the camera body four 4mm holes for M4 bolts .
6) Paint innner side of the adapter and the slot in the adapter to the full depth with the most black and most matt paint you can find. Highly recommend Musou Black paint and an airbrush for the paint application, but YMMV.
7) Using three 10mm and one 16mm M4 bolts attach the lens adapter to the camera body.
8) Install M2.5 square nut into the lens adapter. Use a 8mm M2.5 bolt to lock a lens in the adapter.
*) Tripod mount is optional. Just glue on if needed. It takes 5/8-11 to tripod screw aluminium adapter.
The 100/2.8 lens shows some vignetting due to camera's internal baffle. 65/6.3 and 50/6.3 don't have any vignetting. You'd need to use an external [laser] rangefinder and a light meter [app] to use the camera with the adapter.
The author marked this model as their own original creation.