I have changes from TTDG S300 shafts about 2 years ago to KBS Tour S. in the proces I changes from MB to CB. I recently changed the KBS to KBS C typre as I wanted a lower ball flight starting with my wedges. I was struggeling hitting a nice low penetrating shot with my 52 and 56 and even pw. I play in a very windy area so I want a lower flight. the past weekend, I played with a friends clubs same heads as mine but with TTDG S300 shafts. I play of a 2/3 handicap index. I could not believe how much better the ballflight was and I shot a 69 3 under par on a very good track. the main differance being that I had such good control and was hitting the clubs on the number. I have had a number of good rounds the past few weeks so my swing is working well. I found that the flight in the shorter irons where lower and had good spin on the wedges. the long irons was almost the same flight as my set and I felt that there could even bee a few yrs longer. I know that shaft fiting is complex and individual swings will perform better with one shaft vs the next. I also know that Titleist and Miz and TM still use TTDG as their origional fitment shafts. I need some opinion from the Titleist Technical people on their views.