I like the TTI one because in my gun it was crisp and positive. And the triangle design just kind of guided my finger in to position. But I hated that big ass T on the side 🫤. I like the Dave's safety but the one I had had serrations/ridges? that I don't care for because it caused resistance. I'm using one made for a Stoeger that is smooth and large,similar to Daves but it feels mushy. It's not the spring or plunger, I have fresh spares of those. So I guess if I could make my own, it would follow the TTI design but loose the logo/ridges, or be like the SJ Hardware 870 safety. Indicator lines would be a plus too.