I'd skip the quick disconnect fittings. They leak more air. A cheapie walmart/costco/sears airpig is fine. Mines about 12"diam x 24". 9 gal rings a bell. Its just right for a weekend at the track (if you're adding pressure both mornings). The ones that are half the size run out if you're not carefull. If you showup at the track w/ the racetires slightly overinflated, then a small one would prob be enough to add air the 2nd morning.
SMD
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