Hi guys, just found this forum and have a couple questions. I retired a few months ago and can only do so much fishing and drinking beer. Looking for a way to make a few dollars, enough to pay for bait, beer and lottery tickets. I have a Simpson 3100 psi that I have used to clean my driveway and sidewalks a couple times. Does a good job with a Ryobi spinner but I have noticed that the cream is gone from my driveway.to be honest it might have been gone before I started doing this but I never paid attention. My question is is 3100 psi too much to safely do driveways and sidewalks? If so, there is no way to adjust the pressure on this machine so is there another way to lower the pressure such as a spinner that will take larger jets? Not looking to do more than one or two driveways a week,just looking for a little extra money. Thanks in advance.