I know what you mean Simon, 20 years ago when i used the Prochem 150 for the first time i had a good look around it and thought........this is amazing but complicated, but now i think it was very basic. Head office had a Prochem Performer 800A and when i first saw / used that i was amazed, so much bigger with so much more performance. It was alot more complicated and the fact that a carpet cleaning machine was pwered by what was basically a Nissan car engine blew my mind. As you said, all those years ago we thought that truckmounts could not possibly get any better or complex but they have The Performer 800A was a fantastic unit that was often run day and night. Guys would during the day use it cleaning nightclubs they would then get back to the office and another 2 guys would refuel, restock with chemicals then take it out working all night at huge retail shops or bingo halls and places like that..... The machine itself required very little maintenance. That particular truckmount was running between 8 and 15 hours each day at least 5 days a week. Im sure it had in the region of 20,000 hours on the clock before the van was stolen and found the following day burned out & pushed off a quary cliff.
Richie.