You dont need to remove the chrono buttons to remove the movement just the retaining tabs and screws and the crown, then you can press out the crystal with a crystal press of some times with your thumbs
In my sig below is a thread about when i replaced thre crystal with plexy
The rep factorys must just lover panerai, take a 111 stick a new case back on it and sell a load more watches, it would not supprise me if the rep factorys make more cash from a special edition than Panerai its self, as they are not tied to a limited number
Frank the Kemner 007 was a run of 50 initialy with vintage orange lume and the white Kemmner(small crown) then there was the 50 white lume Red kemmers (big crowns) I have had one and it was a GREAT WATCH but suffers the crown locking the bezel when fully screwed down. That watch is as it comes from Kemmner
Go to watch 25
http://www.wix.com/stellbrink/kemmner-uhren#!uhren-025/048
and watch 26
Looking forward to it, i think i will make a few day/ lond week end out of it and drive up, and may be can offer a seat in the car to a Member who can get to me but they will have to stay the course!