Nice video. Carbon Express aren’t really known for being a high end shaft, but who knows. Hard to say what’s being branded coming out of china these days. Your FOC went down because the Carbon Express shaft is heaver grains per inch. They’re getting their “pile driver” name from the overall weight of the arrow not FOC weight. Only way you’re going to do that is add a heavy insert and/or outsert to the shaft, and maybe change to a 150-200 grain head. But not surprised you didn’t notice much of a change in accuracy, flight, consistency, etc. Now if you had paid $$ for customs from Wyvern creations or something, I would expect you would notice a BIG difference. Problem is, you’re talking $30-40 per custom bolt. Good video!