How to properly mount a skid....let's see...the first thing would be to decide how much water to tote, how big a trailer is needed (or box truck), how to keep a good balance at all times, and how to have easy access to your stuff (not to mention, make sure it's easy to get to for routine service and major repairs). I will not mount a skid on the rear of a trailer. There's too much jostling back there. (Remember riding in the backmost seat on the school bus?) An unobstructed flow from your water tank to the machine is a must. Keep the feed hose as short as possible and still keep it out of the way, NO elbows, and, if you must tee off for some reason, give the machine the run on the tee instead of the branch. I center the water tank over the axles on a trailer or mount them in the front of a box truck. The skid is on the front of the trailer or as close to over the axle in a truck as space will allow. Reels go on the back of the trailer or box...about 1' in on the trailer, and just enough to shut the door on a box. All hoses..feed from the tank, connector hoses for the high pressure to the reels...run down the side out of the way, but easily accessable for repairs. Bolt everything down through the deck and use fender washers on the bottom to prevent pull-through. Another point...if you hook up a water tank and the float tank on the machine to facilitate easy anti freezing, use 2 ball valves and make sure the machine gets the primary run. 3 way ball valves are nice, but it's just another elbow to your pump.