My buddy has a truck mount Carpet Cleaning rig that will run at 2500 psi and 4 gpm. Is there any good way to set up a surface cleaner with these settings. My PW runs at 3500 psi and 4.7 gpm. Technically these both machines require the same tips, but his runs much worse than mine. Is there anything else that can be done to optimize or is it pretty much a done deal? Thanks.