I use quickspins ,and i love them.my groups are very tight and they steer a broadhead great.I have noticed the warping problem,i take a heat gun on low power and lightly make passes along the vane,and it takes the warp out.(dont overdo it they will melt lol.Seriously there a great vane,and i hate just about every other product nap makes!(i live a mile away from the factory) ironic? no.shotty equiptment yeah!