I have made 3 bows so far. They are just self bows but I would like to learn enough to make some good shooters. When tillering the limbs, should I leave the bottom limb a little heavy or tiller both limbs even. I am cutting a shelf in my bows and so far, they are holding ok but I'm confused where I should put the shelf. I have been shooting the bow without a shelf and finding a spot where it seems to shoot well, then cut the shelf there. It seem about 1-1/2" to 1-3/4" above center works but this is just a SWAG so I could use some info. Also, if I reinforce the limb tips on a hickory self bow, would Dynaflight 97 be an option for a string, over Dacron, or would I be stressing the limbs to much. Thanks for any info as I'm just starting out building bows. Don