I shelled out some big bucks for a beautiful piece of camphor burl and put it into one of my Striker risers. When I went to tiller the limbs, CRAAACK! I won't be using burl again. I think it really depends on the design of your riser. If you have a piece of flat sawn wood of solid structure that runs end to end and will bear the bulk of the weight, with the burl on the belly, you would probably be all right. If you look at my Stealth model, I have put wood of questionable strength on the belly side and haven't had any problems.