Chase a heart wood ring, leave it wide, and heat treat to a light purple/ black on the belly once you first brace before pulling very far. And expect the limbs to get rather thin for the poundage. I’m starting to settle in on 1 3/4” wide limbs for the 50-55# area, 1 5/8” for the 40-45# area. and 2” wide for 55-65#. Hope that helps.
Kyle