1camsol

Does anyone have a nitrous bottle opener set-up that i could look at. I got a NX express opener from a buddy and he only gave me the motor. I looked at the instructions on the NX site but im still a lil lost. I was really wondering if the controls are all in the switch. I was thinking about using a window switch cause they reverse the polairty to open and close the bottle. Kinda wondering though how ill know when or if its close or open all the way besides a pressure gauge. Oh last thing is that i have a Zex bottle and im not sure if the fitting on the opener is correct. The fitting has a square cut and the bottle has a square shaft but what exectly holds the motor from spinning. All i have the the motor, the gear, a fitting. If someone can tell me how to post pic then ill put a pic up if it helps. Thanks TR.