Hello this winter I am ether boreing to 102mm or 105mm. My qestion is what are the pros and cons of having a 4+ crank or a 8+ crank? Also I understand that to bore to 105mm you need to have the case bored up when changing the crank is it almost ready to take to the machine shop to have bored? And one last ? how much of the case do you have to disassemble for the shop to do the boring on its. Thank you guys so much for your time, I have never been in a forum this helpfull!!