I have a gas strut converted BSA and all I can say is "sweeet". DaveD has converted a CFX and said pretty much the same thing. CDT trigger, gas strut, Hunter 440, and maybe a fresh piston seal from Macarri....super sweeeeet setup. The struts are totally linear, there is zero twist. They cock very smooth also, no spring making the screen door sound. A well tuned springer would most likely be just as smooth, but this is a different feel...maybe not better, but different. The cocking effort is a little higher than a standard spring.