One of my backs is playing up. The counter is stuck on a number and doesn't reset when opened. I could count the wind-ons to frame one (and beyond) I guess but would prefer to fix it. Also the winder stick at some point with every film giving either blank or double exposed sections on each film.

The cost of repair will outweight the cost a new (secondhand) back so I'm game to give it a go to fix it myself. Does anyone know where i can get a repair manual or layout diagram for the Pro-S backs before I attempt to pull it apart? I've searched high and low!

Many thanks,