Switching to Acc arrows to me is a step backwards. I never had great results with them with broadheads and they always seemed very spine sensitive. When I switched to Gold Tips I was amazed at how much easier they were to set up. I think the aluminum core in the Acc does not allow the shaft to recover as quickly as all carbon shafts. Acc shafts came out at a time when unidirectional carbon shafts were not able to be made stiff enough. The aluminum core was Eastons way to cure that problem. Now with wrapped carbon technology the all carbon arrow is stiffer and lighter and able to handle a wider variety of bow set ups than the Acc. I just tried some Redlines this season and like them just as well as my Gold Tips and both shafts are about half the price of Acc shafts.