The tillering gizmo can be found in the "how to" section, third sticky down from the top. As far as the art. sinew goes, there's apparently two different kinds. One is very stretchy and almost worthless for strings. The other kind makes serviceable strings for short bows, not the best, but very serviceable. I wouldn't use it for anything over about 56" though. The longer the string, the more pronounced the stretch. If your gonna keep building bows, buy a roll of b-50 and learn to make strings. It will save you a lot of money in short order. If you start making heavy draw long bows, even the b-50 is too stretchy. Fastflight and the like is better string material by all means, but pretty pricey. Josh