Bought my mp63's 4 months ago. Did the swing DNA and fitting first 3 shafts popped up were DG's,RIFLE,KBS. Heres my "opinion"; I hit the jpx800pro,53s,59s,63,69s. No matter what shaft I tried in the 800's the club went 7-11 yards further than any of the other ones. Bad part was there was alot of 5-7yard differences in a ball hit the same way, same part of the face, same shot. They were workable to an extent but seemed impossible to keep the ball low. The 59's and 69's felt almost the exact same, but you could hit them on the toe and surpisingly went very well for a blade. One of the more forgiving blades I have ever hit. Now to the 53 and 63 the one noticeable difference for me was I could work the ball much better with the 63, both clubs felt great. I feel like over 2 days going through shaft after shaft, club after club, i could not be any happier with the choice I made. MP63's with KBS TOUR X shafts. Obviously the shaft will be an absolute different feel for everyone but if you are considering buying some new mizunos start with trying the 53 and 63. If you have never hit KBS please try it....amazing. Hope this helps someone.