I have a TM driver I have been playing with for about 2 years and I think either the 913d2 or 913d3 will be my next driver. I don't know which shaft would be best for me. I am 15 years old, my swing speed is about 85-90, and I consistently shoot 70's. I am using a 50 gram shaft in a regular flex right now, And I think it is a little to light for me and it is hard to control. So please give me your suggestion on if I should get the D2 or the D3 and which shaft.