I've been reading up on K1000 repair in 2 different books/manuals. I have a K1000 that has a real bad time with the opening curtain moving too slow at the higher shutter speeds (1/125 - 1/1000). So the closing curtain is catching up to the opening curtain and blacking out half (or sometimes more) of the frame. In know where to adjust the curtain tension and where to adjust the curtain speed on my camera I just don't know HOW to adjust it properly to fix the issue. The books I've been referencing are the actual Pentax repair manual and an Ed Romney book. Anybody ever done this adjustment?