So I just got my first Hassie (OMG YAY)! It came with two backs. One seems to be fine, the other look okay, except that when winding it, it will not stop at the first frame. It "clicks" into 1 and the white dot appears, but it will not stop. The body's advance/cocking lever seems to take care of it from there. Anyway, wondering if anyone knows whether this is a relatively easy fix or not.