Update...

I refletched one arrow, and ONLY one arrow, with these little vanes and headed out to the range. However, this is a special arrow. The only ACC I've got. I picked it because it's a known quantity and a good platform for doing a little comparison testing.

Bow, of course, was my ProTec, LXPro limbs, Accuwheels, 60 pounds, 33.5" draw. Arrow speed around 240.

I chose a selection of broadheads that I've already shot on this ACC, and have flown straight and given good accuracy with 5" helical feather fletch: Thunderheads - 100 and 125, Bear Razorhead, 125 gn Snuffer, and Magnus II w/screw-in adaptor (unvented) at 155 gns. Each broadhead got 5 shots, just to make sure I wasn't making a bad release. Distance was 30 yards.

Jeff, you mentioned someone said they were noisy. Not for me. They flew absolutely quiet, however... Maybe at higher speeds? Needs to be tested, but I don't have a bow that'll do it.

First up was the T'head 100. It flew like a dart! No wiggle, straight to the spot each time. Excellent.

Next was the T'head 125. It had a little tail kick to the left, point of impact was slightly right.

Snuffer showed some definite fishtail and had inconsistent point of impact, left and right.

Bear Razorhead flew slightly tail right, and planed high @ one foot. (Suprized me very much because this is usually the most accurate, best flying head I've got.)

Magnus II flew very much tail left and planed high right @ two feet.

As the heads got larger, with more and more blade surface, and spine got looser, arrow flight and accuracy went to pot. SO... Based on this limited number of shots, I'd say the vanes will work as advertised and stabilize a broadhead IF: 1) The bow is perfectly tuned. 2) The broadhead is small diameter and has little exposed blade surface. 3) The arrow's spine is slightly stiff for the application.

Frankly, I would not want to shoot a large 2-blade, unvented broadhead with these little smurf vanes at speeds any faster than what I shot today. I feel it would be seriously dangerous. On the other hand, I'd have to say I'd be quite comfortable using these Blazers, following the three rules I outlined above.

Did I really say that?!?[]

Just to set matters straight, remember this same ACC shot ALL those broadheads perfectly with 5" helical feathers.