I picked up some of the drt heads just try out this morning when I had a smaller peep put in the Nitrum. I finally got the Nitrum tuned up where the arrows ain't walking left & right as you increase distance. So I decided to try out one of the heads to see how they fly, well inside my shop I only shoot 15yrds but they stacked right with my field points! I will be shooting farther tomorrow to make sure they are good out farther. So I thought I'd try them in my Arena 30. Performed a French tune in it & I didn't had to move anything for the tune. Put the head with 25gr weight to give me the 125gr total & the Arean 30 stack the heads right with my field points! I'm pretty excited about this cause I always wanted to use a 2 blade head but never could get them to fly right.