I was going to stay out of this one as I have no first hand knowledge of the heads yet. As far as how well it will hold up in the tests, I can' t say. It " looks" solid enough. My big problem is the " delayed" opening. Manufactures strive hard to get mechanicals to open on the outside of the animal to create and entrance and exit wound. Yes this head should help stop any kind of cartwheeling that may happen, but since I found that with a well tuned bow and quality heads this is basicly a non issue anyway. I personaly prefer heads that open fast, very fast and always leave an entrance wound. If you don' t get a pass through your going to need the entrance hole to help the blood flow out of the wound for better tracking. The Triska ( I think I spelled it correctly) seems to be a bit better in that both the outer and inner edges of the blades are sharp, but it still opens on the inside. I will put these on the list to test and see what happens.