I shoot the biscuit and I noticed a few warped vanes the other day, the same one on each arrow. I took a lighter to the warped vanes on either side and straightened em out, then turned the nocks so each vane was going through the biscuit the same way, instead of one going through the small opening. The warped ones were actually the ones going through the opening, and you would think there would be no clearance problems, but it was way worse there for some reason. Think its cause the rest is worn out around the opening. Shootin fine now though.