Yes ,fulcrum point for hand placement. I have never heard anyone on here say that raising the string knock point puts more stress on the bottom limb. Their are guys that string walk. Three under shooters. They set their first knock 'POINT ON" as high as they can ,and still be able to tune the bow with a bare shaft. Next three ,or four knocks down from their are really stressing the bottom limb. They use adjustable ILF bows, and are able to positive tiller the bow by turning the top limb out with limb bolts to help even up limb balance some what. When they shoot off the bottom knock for shortest distance the bows sounds like it is going to blow apart. I have used the string walk method, the fixed crawl, and gap, and instinct. All those methods can work. Just a personal choice. Sorry for getting off subject.