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I was wondering if there was any way to convert a C/Y mount to PL mount without a full rehousing. I would love to have a set of MMJ Contax Zeiss lenses in PL mount but so far I haven't seen little to any information regarding this subject. I know it's possible to convert a C/Y mount to M42 so maybe it would be possible to convert it to M2 first, then screw on an M42 to PL adapter which might work on few C/Y lenses but I know for sure the diameter of the particular Contax lenses I want would be too wide to fit inside of the adapter. And I I know It wouldn't be possible to make the flange of the PL mount adapter flush with the flange of the C/Y Mount because the flange focal distance of a C/Y mount needs to be 45.50 mm from the film plane and a PL mount needs to be 52.00mm from the film plane so in theory would need to remove 6.5mm worth of material from the rear of the lens to accommodate for the difference in FFD (Which wouldn't normally be TOO hard), however of course on majority of the C/Y lenses the aperture ring is pretty much right up against the flange of the mount. I guess I could remove the aperture ring but then what? Maybe someone has any input as to how I could possibly pull this off but I believe I've hit a dead end.