I'm a newbie with an RK-21 and my first cleaning jobs are tomorrow. I've got a roof to clean for my neighbor (freebie) and a sewing plant to wash after that. Wednesday I've got a house to wash for the Occupational license lady of our town. I'm so fired up I can't sit still. I have'nt even started my rig yet! I think I'm going to like this cleaning stuff. Another guy stopped at my house for me to give an estimate. Hey guys, I might be able to buy some new skibbies before long!!!!!! I'll let you pros know how it went!