go on, i'll give it ago
used to use a brush to agitate, then a sebo, now a enviro.
my latest improvement is prespraying, used to use a pump up, then hydra force and now hydra force at 600psi.every couple of month i find a way of getting more efficient without lack of quality. allthough i'll admit, its getting tougher. saying that, it was only a couple of months ago that i upped the pressure when prespraying.
anyway i'm sure you guys are right and ive just got my figures wrong.