Quality Archery Designs Ultra Rest HD Pro. Injection molded rubber thumbwheel is designed to force peak vibration amplitude to a minimum, while durable molded rubber creates a comfortable feel. Extended Thumbwheel Lever. Timing Cord is now Adjustable at the thumbwheel. With the ULTRA-REST cocked into the Capture Position, via the thumb wheel, this will assure your arrow will not drag across the bow shelf when drawing, or let down.