I think wonkydonky once posted a detailed instructional on a short stroke / lightened buttoned piston on a 95, evert. Be worth searching out.
Out of interest, my CZ634 - 25mm and 77mm stroke was very enthusiastic to make power and required calming. The firing cycle was very calm. Now even more calm - many who have tried it at Boinger Bashes guessed it might make 7 or 8 ft.lbs as opposed to the high 11s output.