Which Rotovac is Brenden B referring to ?
The DHX twin headed of the 360 single large head.
Either should work with a portable and leave the carpet drier then a wand - thats according the the manufacturers blurb.
If the carpets are being left wetter maybe too much water is going down and the machine not powerful enough to lift it up (sorry, obvious statement).
Perhaps try adjusting so less water, letting the "scrub" machine do the cleaning.
Goran Knight has the 360, maybe he could refresh us with his comments now he has had it a good few months.
but remember Goran has a TM too.
The 360 is on my wish list for 2009 - whether I get it is a different matter!
Solutions UK price was about £300 less then Alltec (as listed) - but who knows what deal can be got with Jan sales on
.