I'm a bit surprised that Hydramaster has not "hipped" up the RX20 by now
They have a cool floating head design which deal well on the lumpy sub floors you find so often under commercial glue down carpet but the over wetting issues, funky balance of the unit and the heat loss all need to be addressed.
I sort of expected John form Mytee to come up with a new RX version.
I think the Hoss cleans best on commercial carpet. Notice the yellowing in the trafic areas.
there is noting HM can do to the RX to pimp it out any more....they tried the half slots and cone jets and just shot them self's in the foot on that one.....the only changes that work on that machine is what the cleaners do to balance it with there equipment......