Wrapping is not always the way to go, it will add weight to the end and could throw off the balance of your arrows. I would balance them before adding more weight just to make sure. If they need a little weight in the rear go for it, if not you could see a difference in flight and tuning. To balance use 10% foc. When finding center include broad heads and the v of the nick for total length. Try lightly sanding the shaft before using the alcohol. Little alcohol on the face of the vanes don't hurt either.
