Anyone know how many fills to expect from a 44cf 4500 psi tank on the af tanks filling from 1800-2800psi? Pomona Airguns running a special on this smaller tank (325.00 w/ gauge, adapter and fill hose). Tank weighs only 11 pounds or so. Seems like a good deal just want to make sure it would give enough fills to be worthwhile. To make the deal better, they are offering a tradein credit of 175.00 toward a replacement tank when it passes its 10 yrs remaining service life.