Thanks goobersan,
A lot of things have been happening. I prepared some more sinew, that's ready to go. I got impatient with my little test horn bow and started to work on it more. The knowledge I gain from that made me think that the horn and core thickness was going to make this bow about 80# to 100# if I kept the ratios at 1:1:1. In the sal or active section of the limb I decided that I needed to thin both horn and core by about fifty percent which hopefully will give me around 50# to 55# bow. So the core and horn thickness is 1/4". On farther research I found out from youtube that that is what Jeffrey Schmidt estimates his horn bows thickness. Since then while I was reading at ATARN one of the builds I have been following had a limb failure. He suspects that the problem area was cause by sinew thickness moving the wood core out of the neutral plane. So I figured I needed to find out more about the neutral plane. That lead me back to the article and testing by Dan Perry on reflex using foam rubber. Anyways I'm ready to start the sinew process, The core has been resized to a nice glossy coat, the tips will be tied three inches closer together and the first layer of sinew will go on tomorrow.