I ran it YEARS ago. I used a vacuum fuel pump, no return, just dead head at solenoid. The battery was just for solenoids / trigger. I ran a 2lb bottle and that didn't seem to last that long.
IMO, to much prep time. Turn on the bottle, arm the system, quick purge. Then know when to hit the button. Hit it to soon and it back fires, blows the carb off and you have a mess.
How big was your shot of nitrous?