4k 4gpm machine I bought from my uncle. I have 4x4s holding up the buffer tank so that gravity does the work when I need to use it. The 4x4 in the 2nd picture is perfect length to hold the wheel tight so the machine never moves. The surface cleaner is too long to ride in the back so I always take the pins out and lay it down on the ladder which rides well. Foam under the machine and on the tank so it doesnt scrape. 3/4" garden hose which is very heavy, 150 feet of landa hoses. I keep my injectors, tips and tools in the truck. Plastic under the bleach so if it spills a little while driving it isnt immediately coroding the bed. I use the X jet for just about everything now, just stopped downstreaming for the health of my hoses. The ladder extends to 17 feet so I can get up just about anywhere at any job. Can't wait to upgrade one day but with this set up I think im just fine for now. Any tips or suggestions you might have will be appreciated.