Just doing some testing on the machine and figured I would post some maybe useful things. When switching tanks: 40 PSI setting With one gallons tips it takes 17 seconds to spray/clear the lines of the previous tank selected. It takes 50 seconds to spray/clear 50 ft, of 3/8 hose, from the previous selected tank. Test was done with a stop watch and water dye into a clear jug. Anybody else?