Hey there, I have a gen 1603 that I am trying to put a 1600 smooth bezel on, and it is just too tight. The crystal measures about 30.6mm and the bezel is 30.38. Do I need to shave he bezel a bit? I should probably have a watchmaker do it on a lathe, correct? Also, I kinda cracked the crystal at the bezel; are the Clark 25-118 xtals any good? If not, what do you recommend?