rdm, rotary dri master, doh!!!! 500psi? whats that, about 30 mins cleaning time with 60 gallon tank.
not doing it with a porty susan, doing it with a trucky, dont think it'll go down to 40 psi? anyway i'll be fine, as little moisture as possible to get the clean right and if it shrinks then i wont touch another one til i invest in a low moisture machine, if it doesn't shrink then the worlds my lobster.