Well I am about to make my first yellow heart bow. It will be a tri-lam: bamboo backing, purple heart core, and yellow heart belly. From what I can gather from other bowyer's on here and other various depths on the internet, yellow heart is actually a pretty decent bow wood for the most part. The specific yellow heart I have right now seems pretty flimsy, not very stiff at all. So I am not sure I have some good yellow heart or not. The bow should be around 1" thick total (at the handle), and 76" from tip to tip after glue up, and maybe 1 1/8" wide (at the handle). My only concern is if I am going to crush the belly or not. I don't plan on gluing in any more than like 1/4" reflex or so, if that.