What are the theories behind application rates? I spray at 2 gpm, while I know some companies spray at 4 gpm and still others spray at 1 gpm. I am trying to get a dedicated treatment truck put together for next year and this will have a large impact on the tank size for the spray apps. Right now, 200 gallons is not near enough with a 2 gpm tip. Maybe someone can enlighten me on what the pros and cons of each are. I really want a medium duty truck with a 600 to 1000 gallon tank, but maybe I wont need it. Why do the TG/CL size companies use these big trucks?