Wonder wands are fantastic as far as i'm concerned.
Carpets dry very quickly, and i rarely use drying strokes.
To demonstrate to customers i run over a patch at 500 Psi, with no drying
stroke, and kneel down immediatley, no wet patches on knees.
If there was an auto fill and auto dump to go with the Powrflite, i think you
would have a great machine for commercial work. Each year i do 3 schools for
Worcestershire council, and wish i could run at 500Psi continually. Unfortunatly
at this pressure i'd be re-filling every 20 Min's.