Gary, you are wrong with regards your question to do with psi etc. Doug has answered it in technical terms before so I hope he steps in and does so again as he is much better at it than i am. Basically it is to do with the volume of water moved, not just the psi.... A morris Minor hitting you at 30 mph might hurt alitle bit, a 38 tonne lorry might hurt just a little bit more...... why? both were doing 30 mph....... To Spinnaker, in England where of course we are, the potential loss of customers by using a truck mount over a portable probably isnt that great because the general public doesnt know too much of either. In other countries where they still have clean offs between all types of cleaning machines the public are far more aware of what does what. That is why everywhere else in the modern world the figures are always on the side of the truck mount. For the record, insurance companies wont use any other system other than a hot water extraction system and the figures used to be that of the hwe systems being used 87% were truck mounted............... To John Rimmer, thanks for your comments. I have never said that you need one machine over another to be a good cleaner, I have always suggested that we as cleaners should just use the best machines. Again how many portable users would change their machines if the truck mount cost the same to buy and run?.......... To Alan Brooker. I dont use a truck mount for its speed in use, in fact on many jobs it may even be quicker to use a portable, I use them purely because they are a better machine not anything to do with what I charge because like I have said I charge more for using a portable........ I would still like to hear from the CFR people because I have not seen what their machins can do and I am curious to new fangled ideas. In the past I have offered to go head to head under test conditions but havent had a CFR company willing to clean off with my machine. Maybe I can find a tech on here at least willing to show me what their machine can do...... Best, Dave.