For the life of me, I can't make a good bowyers knot. It looks like such a simple knot, but mine always loosen, or twist in the string grooves so the string isn't centered with the limb. This is really aggravating me. I feel I am a halfway smart individual. I have been tying my own shoes for several years now. I should be able to figure this out. When I am tillering a bow, I tie loops in the string at one end. When I am ready to shorten the string, it takes me forever to get the loop undone so I can tie it shorter. I spend more time messing with the string than tillering the bow. I have 4 bows ready to tiller so I want to figure this out. Can someone please take some detailed pictures with directions.