RE: Arrow crests
yup...works like a damn. I made a little clamp instead of a v-block to hold the arrow. I basically took 2 pieces of wood, drilled holes (1/2 hole in each piece), then covered them in in fleece, used pipe hanger as the hinge and voila! You do have to strap the drill to the wood, thats easily done by using pipe hanger strapping. It' s great because I can vary the rpms too.