I'd like to purchase a powerhead and I have some concerns/questions regarding them. I've done some research and heard some things, I want some forum feedback on this. I don't like the idea of a slip over the tip type because I don't feel like fumbling around with it when in a pinch. I've heard that some of the screw on models will fall off the shaft when shot (makes me wonder about the one sealark had for sale, found on the bottom). Also I know that Clay-doh has had issues with his predentonating when fired (Biller I think). I'm thinking maybe Beco... All opinions welcome. Thanks.