Yep, second dishwasher is a KDS-18. It seems to be in very good shape. I don't think it was used very much. It is pretty clean and the wash arm has little wear where it contacts the pump housing. What kind of material did they make the pumps and cental part of the washarm from? In my Hobart and also on the Kitchenaid, you get this stringy fiber like material on the strainers that you can tell comes from the pump housing. I have put i think 2 pump housings in the Hobart since I have had it. It only had 4 screws holding the two parts together and over time it would warp, the gasket would get pushed out and water would come out the sides of the pump. When you buy it new, it is nice, shinny, and smooth, but over time, it gets rough and seems to degrade. I have put 4 extra screws in the pump housing to keep it from warping.