Please keep in mind that this is the first medium format camera that I've ever even used, so bear with me. I'm trying to fix the thing so that it's usable. The faster speeds except for 400 seem to do their work, albeit a bit slow, but the slow speeds are *very* slow. I'm thinking of just sending it in for a CLA so that I don't have to deal with it because it's going to annoy the heck out of me trying to figure out if it's actually usable as-is. Does the shutter only fire when there's film in the camera once the back is closed? Also, how can I get to the inner workings to see if I can at the very least scope out the shutter problem at 1/400th? Aperture moves smoothly and the focus is very stiff but usable, so the shutter problems are the only things keeping me from moving into MF.