RE: NAP Razorbacks????
If you want the same style head as the razorback, you should really take a look at the Magnus 4-Blade Stingers. I have just picked up some and did some testing. They fly right with my FP' s, ultra sharp out of the package and out penetrated other fixed head i have used (this includes: Muzzy, TH and Wasp SST' s) All 4 heads were 100 gr and shot with the same bow & carbon arrows. They look identical to the razorback but don' t rotate, which I think is a good thing. The blade seems beefier as well, although I have never shot the NAP offering. I just compared them at the local shop and went with a 3 pack of the stingers. I have already gone back and picked up another 6, I am very impressed you could say!
Just a thought, good luck!