hello all, so i ended up testing my moms old om-10 and the shutter speeds are ofd with the biggest difference for example being the 1/1000 measuring at 1/521 i had already cleaned the mirror magnet and it seems to function properly so could it be that the curtains arent opening correctly if so would Messing with this (picture attached) yield me any results on getting the speeds correctly? (From the diagram this should be on the bottom cover of the mechanism or am i naive to think a camera known for many faults is that easy to mess with)