Dimitris -- I haven't had shutter problems with my ML, but others have. It is electro-mechanical, and some of the problems seem to be caused by dust in the mechanism. (An additional Minox forum that includes 35mm is www.minoxography.org - based in Europe).(posted 8176 days ago)8x11 Minox Cameras: for manual control, I have used my Minox B since 1970. It has a selenium meter, and selenium meters wear out over time, so I don't use the meter. Slightly smaller would be a Minox III, IIIs (with flash synch), also called a Minox A. No meter. These however tend to be more expensive on the collector market than the Minox B. So what if it's slightly larger because it has a meter that you can't use? These cameras are small!
8x11 film processing: Commercially, this is expensive; too expensive for me. I bought a Minox daylight development tank for under $100, and it works perfectly. For printing, you need a short enlarging lens and a carrier to hold the 8x11 film. I found a used one for Beseler 23c enlargers. I can evaluate negatives with my Emoscop (emoscop.com) and print the ones I want. That's what I do with 35mm also, using a bigger loupe.