I know this has been posted and asked before but my question still is unanswered. I am gonna have my 907D2 re-shafted and I found a 4" parallel shaft for it. But it says installation 3.5 to 4". I'm not sure which to use and why? Is there a reason for the 2 different installation lengths? I also want the driver to play at 44" so is there any tip trimming required with the shortening of the shaft? Or what is the recommended tip trim? The shaft is a Grafalloy Pro-Launch Platinum. Any and all advice and info on this install is welcomed as I want to give it to my installer with as much pertinent information as possible.
THX