I just put a Vapor Trail Limb Driver on my bow this morning. Exceptional results! I REALLY like the idea of the chord mechanismbeing attached to the limb instead of a cable. A measurement for center shot, one for nock set to get started were all it took. First arrow (bare shaft) bullet hole. Then for clearance check (hold your breath time here!). Bullet hole! I can't say enough about the Limb Driver!