Yes, Pat, the BW is a quicker design; but I like Hill bows for their magic, and they are still plenty fast enough for pass-throughs and good penetration. At the moment, the arrows I have for it are about 9gpp, and there is a little thump, which I don't mind. Soon, I hope to rig-up some heavier arrows using the front-loading jig. I'm glad you enjoyed the yarn! Thanks!
Danny, that formula works well, and my mates who are getting into wooden arrows are using it with success, too! Thanks again!