Had a thought last night when I was working. (I do that a lot when I'm working all alone at night)
I want to thank John Geurkink and Clark Lancaster for developing the OP method as a technique and equipment to make it happen.
I'm making more money now than ever and having more fun doing it. Yes there are newer equipment on the market and some of it looks pretty sharp. It all had to start somewhere and for me it started when I went to KY and spent some time with John. He was gracious enough to put me up at his house and show me the ropes. When I first heard about the method it seemed so simple that it just couldn't work. I knew I needed a $50K truckmount again..........Until I tried it for myself.
Add to this the new chemicals available from Vacaway and others and you have a really valid cleaning system.