Can anyone please tell me the name of a repair manual for screw mount Leicas. I remember seeing one in the 1980s which went up to the IIIG and I think it was a copy of a genuine factory Leica repair manual. I have also seen a manual which shows all the steps for dismantling and repairing a screwmount camera which I think was written by a hobby repairer. Does anyone know thier titles or where I might find a copy. <p> I should appreciate any information.