Diamana supplies multiple shafts. The primary ones are LTD White, LTD Blue, and LTD Red. The Red (formerly designated M/M+) is the highest launching shaft. The 60 g comes in A/R/S flex shafts. I previously used the Blue (S/S+) in R flex but for 917 (F2-18 degree) I was fit in the Red in Stiff flex (in my case, the same as my 917 D2). The flex was based on how I load the shaft in transition, not on my speed (just under your speed). If you go under clubs - fairways and open the link on the Custom Options, you can see the comparison of characteristics. The LTD Red is with the other highest launching shafts.