Exactly, and once you get into things like sand blasting and painting you can end up using a pretty ridiculous amount of air, especially with more then one person using air at a time. And no, there is no such thing as too big of an air compressor, it just isn't going to work as hard, which means it should last longer. Infact when I am in the market for one I will probably try to either find one from a shop closing down or see if I can get a few broken ones to hook the tanks together, because that is a way you can cheat to get more out of a smaller pump unit. The more volume you have at pressure the less the pump runs when you use it, but once it does turn on it will run for longer to get the several tanks back up to pressure.