Glad I could help. David, I agree with the rotating head being a gimmick. I would like to see new archery products get rid of the composit and " spinning" blades and just beef up the head. Thunderheads are a very fine broadhead, I know I had my doubts about them earlier until I did some more testing. They are a good bit sharper than Muzzys, but I have found both to shoot very well, infact I really can' t tell any accuracy differnce. To be fair to new archery products I will pick up a pack of the 125 grn razorbacks and try them out. who knows maybe they improved the heads?