I had once had to take apart an optical camera. The approach which worked for me was: a) Unscrew a few parts b) Screw them back c) Unscrew a few parts and s

I had once had to take apart an optical camera. The approach which worked for me was: a) Unscrew a few parts b) Screw them back c) Unscrew a few parts and some more d) Screw everything back in that same order ) .. repeat until done Finally, it all ended well