What pumps are you using? Newish or in need or re-builds and/or new gaskets? Good pumps used right work. On the road, I use the Zephal frame pumps, HPX and I still have a couple of the old HPs. Both with lever releases. Easy on and off, no leakage. My Specialize floor pump with gauge, same thing. I see no reason to use screw on anythings other than to modify the tire valves for either my pump or a gas station air (very rarely). I have the presta to schraeder adopter for that gas station and carry schraeder to presta with me on rides so I can assist someone on an MTB. But for everything else, I consider life to short to be screwing in valves adopters every time I want to add air.