NX sucks. Steer clear at all costs. I am a Zex advocate. Kit #82011 is the "universal" kit for them. Comes with 6 jets for 55, 65, 75 shot. You can buy more jets if you like for bigger shots. Still, I would strongly suggest a bottle pressure gauge and a heater as well. The Zex kit it self is cheap, but the little add ons are what kill you...
