All, looking to upgrade my 53's (still in amazing condition as I have them always covered ). Can't decide on 919 hot metal or forged. I obviously can't source the demos for these but have managed to get their 900 equivalents . See how much better they are compared to the 53. For a longer term experiment to see which direction i go in. Now on a search for a Project X LZ to put in them. My question is WHEN i do find a shaft hiw do i chenge it. There is a little screw of some sorts in the hosel. I'm still playing MP650 in driver (hard to beat) so don't have a standard wrench to try. If I did will it fit ? ( I can source on the bay.....) or does it need a different kind of wrench? All the best, Rhodri.