My son and I just finished our first trailer.A 6x12 enclosed with 2 cold water 4.5 gpm pws.,200ft. of low &200ft of high pres hose on reels over a 125gal tank,2 chem tanks plumed to downstream from each or run our roof mix to a delavan 5850 and out 200 more ft.on a reel for low pres. cleaning.I would like to ask if any mixes could be shared without losing any edge you may have over a competitor. We are doing roofs,{have the mix for that but am all ears} houses,concrete stucco pavers and some wood in the future.It's really about how similiar the house mix may be to the cocrete and the roof mixes with differnt levels of sh. We will be using sh. tsp and h2o at about 40% for tough stains and tweaked down with the valve system in the trailer as needed.I wonder from reading here how close we may be to other mixes with the twist of a valve and a soap added to a chem tank.That was my goal when building this rig. I see you can get a personal message here or you can call my cell @ 609 332 5569 I am in south jersey Thanks so much troy foster