Thanks guys. I have a quiver of bareshafts, ranging in spine from 55-60 to 85-90, which I use with a new bow to see what spine arrows it shoots and to find the right nocking point (which, for me, is usually almost square- I don't actually check where it is, just how the arrows fly).
I was jsut curious because I had read about tuning fiberglass longbows and recurves- and about halfway thorgh I stopped and looked over at the rack of selfbows and a BBO on the rack. It had never occured to me about tuning other than finding what arrows shoot best from the bow and at what nocking point.
Glad there isn't more to it than that
!!!