If you are going to tiller on a tiller tree, I would figure out where you plan on placing the arrow nock on the string, then figure out where the center of your middle finger will be on the string when shooting the bow, and place the trees pull rope right where the center of your middle finger will be. I assume my string nocking point to be 3/8th above the arrow shelf with arrow under the string nock and plan it out from there when tillering. Then tiller the bow for equal limb timing.