Found out this weekend that shooting cock feather down has softened my brissles enough to allow my arrow to fall through to the bottom by barley stroking the arrow back and forth on the rest.
I installed a new, barley trimmed, bisquit and eleviated my vane contact problem. Turnes out the softened brissles were aloowing the arrow to drop to the side during the shot, causing hard vane contact on the side support post area (deluxe model) .
Now I shoot cock up and left the brissles under the arrow alone, for extra support. I only barely trimmed in the area of vane contact.