I just got it in the mail today! I'm thrilled! It's in pretty good physical condition; however, it's got a fair amount of dust and dirt, and a few paint chips around on it. The shutter, however, is stuck in the open position. I've hit the shutter release a few times, and it clicks, but does not close. rotating the shutter speed ring causes the gears inside to whirr and click, though not too consistently. The aperture works, and the focus is smooth and appers consistent between the viewing lens and the taking lens (I held a piece of negative sleeve across the film plane to look at the image). I've read a few articles on restoring these cameras, but I'm not the best with "precision" devices, and I don't want to damage anything. Is there any place I should start or anything I should try off the bat? Help greatly appreciated!