I also have a small hobby lathe, and like my knowledge of astronomy , I have the very basic skills, I know where the off button is
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I haven't seen a 35mm film canister for over a decade, when I was sorting through my father's estate. He had a Pentax camera with all kinds of unusual items. I still have the camera, but have long since disposed of any canisters. I guess I could start a new hobby in terrestrial photography to supply my astronomical hobby with parts
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Have decided to take an old USB hub and salvage one of the connectors so I can get rid of the integrated laptop cable. Wires very small, 28 or 30 gauge, making them a bit tough to work with.
I'm guessing that centring the sensor is probably not a super critical thing, and +/- 1.0mm should be accurate enough? Making sure it is flat on the focal plane would be the more critical aspect?