Hello folks. Im pretty new to photography and one day new to medium format. The 500c/m just arrived with an 80mm lens, 2 backs and some other corn. It has some issues. The 24 back has the felt light seal peeling out from behind the slide the camera wont fire with the 12 back on as if the slide is still in place when focusing at infinity, the two images dont line up (the object is behind infinity focus) Can anyone help with these issues?