Maybe these have been around for a while. I seen one at the PA Bowhunter Festival this past weekend. Cool concept. I drew a bow back, and it wouldn't go down even after I let up on it. You literally had to push the string back down. Anyone else see these or try them? What are your thoughts on them? Is this the direction to go for hunting bows? I'm sure it would be tougher to get a back tension release to fire being that it is 99% let off.