I think you have exceeded all reasonable expectations with that stave! Yeah, of course you are hitting the wall, check out the string angles on those tips, Dude! Some set is to be expected, looking at the length of the bow and the length of the draw I would have expected drastic set IF the bow survived.
Great job, love it! And if you decide to keep it nekkid like that, I got no problems. Any additional paintin' and decoratin' is just gilding the lily! That bow is nothing but down and dirty archery.