Why switch from CO2 to compressed/HPA (High Pressure Air)? Compressed tanks are more consistent and are not subject to temperature fluctuations like CO2. Compressed tanks can be filled using a fill station once you have purchased a scuba tank from a local dive shop.
Barrie Paintball strongly recommends that you use a fill-nipple on your HPA tank. A fill-nipple cover will help keep dirt and debris out of your regulator and save you costly repairs down the road.
SAFETY ADVISORY: Never, under any circumstances, use oil or any petroleum based cleaner or lubricant in your compressed air regulator, tank or fill nipple. Petroleum based products can ignite when exposed to compressed air creating a serious safety hazard.