Thank you Gentlemen for your replies. The gun that I have will need the bent on the hammer reworked anyway as somebody has attempted to reduce the trigger pulls and stuffed it up. It may therefore be easier to just make new hammers without firing pins and machine and install disc set strikers at the same time. What I really want to know is if anybody has had any problems with the frame stretching or cracking with such a conversion. I purchased the gun for a very good price and it is in otherwise reasonable condition. Thanks again.

Waidmannsheil.