Have you checked to see how many fills you'll get from the 68 ci tank? May be better to sell it to a paint baller and put the money towards a guppy from Joe. It comes with a slo-flow valve and microbore hose and holds almost twice the air as the 68 ci tank.Here's a calculator.http://www.calc.sikes.us/2/68 ci (4500 psi rated) is 12.2 CF