I did buy Viair 400P-RV expensive however, I just used it for the fist time today 1. I added 3-5 pounds to my van in 3 seconds same for my toad.2. I added 5 pounds to the motor home tires 22.5 average 30 seconds. amazing I forgot to run the engine and it did not seem to hamper the performance.
Gene and Bea
2008 Fleetwood Pace arrow , Allison 6 speed transmission 38P work horse W24 chassis 5.5 KW gas Onan Generator with 2009 Saturn vue.