Help Please:) Repairing Olympus Pen F film camera :) I need advice ;) & a detailed repair manual :-D

I just bought an Olympus Pen F film camera and would appreciate any advice on repairs do’s /don’t do’s..

Does any know where i can acquire a detailed service repair manual?

i am doing a CLA, Light Seals etc..

The 1/500sec shutter speed tests at 1/280sec ..so needs some adjusting ;)

For re-assembly i need the correct “Body Flange Back Length“ measurement in mm

Looks to be a fun project :)

Cheers

Lion