That is primarily for glass lam bows. Since this is an all organic bow, and my design is pretty close, I will be tiller from the belly. That is why I made the belly lams 1/8" parallel. Ill only hit the sides if I see some limb twist, or high spots. But when I looked atthis bowthe other day, everything was jiveing pretty good. I used the deminsions from a board bow design I worked out last summer. I like to use a design that is pertty close so I dont have to worry about taking too much wood off during the tillering. I didnt get a chance to work on the tiller last night, but ill do my tillering with 45 girt sandpaper. Usually I start with card scrapers, but since this design was pretty darn close, ill probably be able to tiller it with just sand paper.