You guys should take a look at the low profile X-vanes if you need 4" for your local 3D's hunter class or for IBO, I got a box 2 days ago and already have my pro 22's fletched up with them and they fly great, and after several VERY tight groups I managed to split 2 pin nocks, but no fletching damage. They seem to be the same material as the blazer vanes so they have almost no memory. I also like the vanetec's but the low profile cut on these is awesome, and should outperform others in the wind.