After all of the comments on Alum. vs Carbons i did some testing. I started shooting Bemans about 1 year ago. My buddy has been shooting carbon evolutions about 8 months. Another buddy has been shooting XX78 Super Slams for about 10-12 months. I checked all of the regular practice shafts for all of us (I shoot the most then the slams, and the evolutions are shot the least). My new shafts were +- .006 all shafts were within .009(2 were less then .006 out of 5 shafts). Carbon Evolutions new were within .004 now they are all within .007(1 was .0009 all others were .005-.007). And what do you know the Super Slams that started at .0015 were in between .005 and .015 (very bad) only two shafts were better then the carbons .009 a .006 and another .006. This is not an opinion this is actually testing of used shafts. Maybe its the super slams but i doubt it. I'm going to be testing some XX75 in about a week.