I have a buddy who wants me to make him a cherokee warbow with a min weight of 75#. I have a long piece of black locust and a ton of osage, but all the osage is fairly short. I've never made a b.l. Bow or any bow over 65#. My question is if i use the b.l. Ill half to do a ton of heat straighting. With that kind of draw wgt. Do u think i could weaken,the bow to much and make it unsafe.