maitus the weight of the sinew may not help with speed, but the bows above hav free of charge. wood flaws, and when I am in doubt I sinew back. Most of the bows in the pics will shoot 15 to 20 over or 100fps + poundage. .Your bow shot 45fps over, or better than 2 times my number which is amazing. Thanks Brian. I managed some reflex, but I had to make some repairs on the wood. Not great Elm, but good enough to get a bow out of it, and the price was right. I got it from my son's land. Saplings. To old to go out, and cut giant trees any more. Bob>>>