Hello. I am trying to resurrect an old OM1 (and an OM10) that I used a great deal in the 1980s. It has been sitting for a good many years and the shutter release is jammed. The winder works. This seems to be a common problem and various videos show a repair involving resetting the position of the idler gear. I tried doing so but in the process managed to drop the screw that holds the gear in place. I have been unable to find a reliable post anywhere that confirms the size although one poster alleged that it's a 2.15 mm diameter screw. Can anyone here confirm that and even better have a recommendation as to where I might buy one? If all else fails, I can buy a donor parts camera but that's an expensive solution for one tiny screw! Thanks in advance for any help you can give me.