Well blood wood for me never wants to stay straight. It always twists like a barbers pole right off the first cut. But I always wanted to try it as a core, as it seems most everyone else uses it as a core (in english longbows). I ripped some out recently, it is a bit twisted but not absolutely horrid. I mean, it ain't ideal either though. But I was wondering what a twisty core might do to a bow once it is glued up and tillered out? I am thinking of using it in a triliam english longbow as a core, maybe 5/16" or so thick in the middle, tapered to 1/8" or so maybe at the tips. For the life of me, blood wood does not want to stay straight.