with a self bow, that would be a ELB design and that is the reason the belly and back are trapped. Some woods like a back trapped, some a belly traped, and some like to be flat. Ipe is a wood that does great with a trapped back, but flat belly. It holds reflex and deflex better that way. Osage is the same, when you back it with boo. Or in my experience. Oak does good with a trapped belly and back with a light backing. The trapping makes the bow a little more snappy. But nothing cures the set. The only cure ive found for set with the oaks is to induce a butt load of reflex. I built a whiteoak self bow one time and induced 7" of reflex along the limbs. After I was done, I had 1" of set. Thats 8" of follow. Not good. Ive had some red oak designs that I was able to hold decent reflex, when using Perry's reflex. The best I got was 1.5" of reflex when done. I induced 6 inches to start.