Pretty innovative! I like his top-trigger mechanism that lets you use nocked arrows and shoot upside down even!
I don't care for his tiller design but then my Lady says I don't have such good taste in that arena!
I just recently experimented with his PVC pistol prods and have two -- one 12" and one 10". I baked them in the oven rather than using a heat gun. Two to three minutes @ 400F. Then I made a jig from a piece of 2x4th that lets me mold in the recurve all in one operation.
Think I'd do the same thing with this longer/heavier draw prod too - a jig for each limb with the recurve cut into it. Not having a heat gun, I could use a BBQ grill for a heat source.