Thank you kindly fellas! It is indeed all heartwood. I chased a ring on a belly split. A lot of you that have never used walnut may be wondering if it really needs to be as overbuilt as this bow is? No...it does not. Momma just likes a really long bow. To get the best out of it, I had to adjust the tiller a bit. It shoots nice enough with the adjustment, that I'm considering making myself one of similar specs for 3d shoots. Thanks for looking! Josh