I have most of a Rolleikin 2.8 II which I'm attempting to mount in an MX-EVS 3.5 with counter installed. Problem seems to be that the ratchet pawl (?) on the 35mm film gate assembly stands proud of the take-up spool and seems a tight fit against the camera back. Never had a problem mounted in a 2,8C and I've always assumed the basic difference between 2.8 and 3.5 models is the front cover for the lens shade. According to an old copy of the Practical Accessories, the Rolleikin in question should work in bodies numbered 11000000 and up. Any help, suggestions, etc greatly appreciated. Health, Peace Lance Selma, NC 27576 **************New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out (http://local.mapquest.com/?ncid=emlcntnew00000002)