I guess for once, I am going to be one of the Guinea Pigs, instead of the cautious tight-wad who is a year or two behind the curve. I just ordered a set of these to try. Since I just sold my Pro 38 DC, which pulled #65 when bottomed out, and bought a #60 Pro 40 Wheely, I figured my ACC 3-60s will be overspined. Not sure how much difference it will make, but I thought I should get some 400s of some kind to play with, and these look interesting. I don't do enough 3D to get serious about it, not worried about "line cutting" and such. These look like they have good potential for hunting arrows. Maybe Len or someone else will solve the nock situation as well.

At any rate, they looked like they were worth trying, so I am!