904 question

When I rebuilt my 904 I had help from another member here fishy68 and I used his specs of .012-.015 per clutch plate. I know how crazy the factory clearances have such a huge range. I know the snap rings can get to about .090 thickness I believe but also you can get a new pressure plate if the one you have is worn down. Im an expert by no means but the guys on here helped me out and now mine works like a champ. Maybe one of the trans. guys will chime in.