I placed a s.s. swivel between the dema valve and gun to eliminate the hose kinking, I then replaced the end of the wand on the gun with a 1/4 female quick connect coupler so I can choose from a variety of spray tip orifices and deg of fan. I also found that by doing so I can run a compact foamer tip on the end of the gun. This causes the prespray to foam up as it leaves the tip. The "foam" prespray stays on top of the carpet longer allowing it to work on the "visible" soil longer and also keeps the prespray from soaking so far down into the carpet leaving less moisture behind when I extract. I can post a picture of the foamer tip if anyone would like to see it.