I talked to Nick Snook at the sportsman's show in Harrisburg. He informed me that he is working on a new formula of plastic for turbo nocks and the "hunter" version should be available in white in 2 months.
I have used the target version last year after seeing them at the show and found they do work as advertised.Paper tuning is somewhat different in that you need to move your nock point up or down if you get a left or right tear. (Mentioned in an earlier post)
F.O.C. becomes a non issue according to Nick because of the spin stabilization imparted by the turbo nock. I also found this to be true through my own testing, using different weight points ranging from 75gr-125gr on the same arrow.
My only real problem with them is they can pop off if you snag them on something while walking through the woods. Nick said you can overcome this with a small drop of superglue at the edge of where the shaft meets the edge of the nock.
I can tell you they also work great after busting a vane off of the nock. Which you will do once your bow is tuned for them.
All in all they do work as advertised...the hardest thig will be getting used to the funny looks everybody will be giving you when you show up with them on your arrows.
Oh yea, fletching a dozen arrows takes about 2 minutes after you glue in your point inserts.