I'll have to check out that Zenith. I have to admit that I do not shoot my BT release when I hunt in the winter. I use a Winn Freeflight relaxation release. It is the only release I have found that hits to the exact point of impact that my Carter Atension does. To keep it from firing you must keep pressure on the index finger, just like a BT release. Just like the BT release I shart to apply back tension and relax my hand. The result is a true surprise release.