I purchased AP1's 6 months ago in steel shaft with the standard supply shaft. I am a 35 yr old female of height 5'8. About 3 yrs ago when on a launch monitor my swing speed was between 70-80 mph and also at a png demo day i was advised to stick with steel shafts. However, i find the long irons in particular heavy and i am conisdering switching to a stiff flex graphite shaft. Would this be a good move and should i be looking at a heavier graphite shaft. Also, i would like a shaft to help me launch the ball better. Have you any recommendations for me?