Both the Maruyama and Solo bypass excess pressure from the pump back to the tank. I also consider the fact that when using one of these units, you are walking. To apply 1 gallon per 1000, I am walking around 2 MPH using an AI11004 tip set at 40 PSI. If I have the 3 nozzle boom, I am definitely moving. That set up is passing 1.2 GPM.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738