Anyone know what the units are on the supplied flowmeter? Does a setting of "3" equal something like 3 cc/s? Or maybe 3 cubic inches/s? Mine is so erratic i'm thinking of replacing both the flow meter and the control valve with something a bit more "regular" and need some sizing info. I guess I can breakdown and just pull the inlet tube and stick it in a quart of water and see how long it takes...