Stop doing downstream 12 or so yrs ago when I was told to give the x-Jet a try. We use heavy chemicals mote then most because we have a very hi GPM rinsing capability and X-Jets can easily put down more chemical then downstreaming. So we never went back. The adjustable X-Jets today rule and cleaning solutions along with rinsing speeds up the job a ton in most cases with excellent results.
Good luck and Enjoy watching your wallet get fatter with the use of your X-Jet
X-Jets rock!! I bought my first one from Ron Strickland from X-terior on the old Delco bulletin board(owned by the Hinderliters) when he posted about it then around 1999. He used to post here on PWN when Dan Flynn started this bb in 2000.