After buying my new 74 cu. inch air bottle I took it to be filled, only to find out the paint ball shop by me didn't want to fill that seize bottle. I now had to go to a dive shop 1 Hr & 15 minutes away each way. They filled other air gunners bottle at the shop also. Then one day they decided to raise their price per fill from 4.00 dollars to 16.00 dollars. I took a moment and I started looking at what the real cost was. Taking the governments cost per mile for vehicle operation plus the fill cost and taxes, it was costing me 72.00 dollars a fill. So 13 months ago I purchased an omega super charger. Now after 26 fills I'm enjoying free air.