A also ran a 2.5 pounder in a bracket dragster for like a whole summer at a time. It made one puff of air pressure per run shifting my powerglide run after run, 10 ozer would have been enough. Then I went to a electric shifter for that powerglide and that nice hurst shifter between my legs, much better than air=electric.

I've had 3 paint ball places tell me they did not have the fittings to fill my bottles. I have had fire ex shops fill mine for the last 20 years. I used to pay $5 in Huntsville for a fill but here in Louisiana it cost $15 for my 2.5 bottle.

interesting thread..... just going down this road myself. Have one bottle, but thinking I'd better have a spare just in case. I haven't tried to have it filled yet.