Notice how the damage only occurs to one of the three vanes. Well, if you problem was based solely on your arrow passing through the biscuit too quickely and heat warping, then wouldn't all three vanes become equally rippled? It seems that your vane that is being damaged is coming into contact with the outer edge of the biscuit or the biscuit's bracket/brace much like mine is. Maybe the new bohnnings that you switched to have a shorter height and clear what ever your duravanes were hitting. But this could be optimistic thinking. Anyways, I obviously have my own problems.