Anybody have any experience with this body/lens system? I currently use a Contax 139 Quartz with a Zeiss 50mm f1.7. I am interested in the Super BC model. Is there any issue's with this system? I know about the front element seperation with the 35mm and 85mm. I have also heard about a possible issue with the film spool. Nonetheless, I think that this is a unique and interesting model.