Great Cameras you got there!
May I present two of my most recent projects. Both use the Minigon XL 38mm F4.5 lens of the Lomo LCA-120.
Housed in a custom made mount in aluminium for the Compur shutter. Focusing from 0.3m to infinity with magnetic stop at infinity. Aperture ranges from F4 to F16 ( the lens is originaly a F4.5 but opens up further in the compur shutter)
The one with the wooden inlays was my first attempt based on a zeiss nettar with two hotshoes for the 38mm finder and a Doomo light meter.
The second one is based on a Seagull 203 and allows for switching between 6x6 and 6x4.5 format. Same viewfinder (38mm) but this time included in the topplate. Also built in one of those Reveni Lightmeters and got rid of one of the biggest flaws of eating through button cells by using a AAA battery inside the camera.
The camera also has a fitting 6x4.5 mask for the viewfinder stored inside with magnets.
Built them because I couldn't afford a Hasselblad SWC...