But just then that wounderfull brown truck pulled in my driveway and delivered my new blue diamond! All I can say is wow...it did an excellent job. My pool my was about as dirty as it gets, I had just finished stone raking ,planting seed and chopping hay around the outside of the pool yard. The diamond ran about 90min and the pool is spottless!!!!! 8) A few questions come to mind, 1) should I do anything special to rinse the unit because of my swg, 2) I know it's pre-programed but will it "learn" my pools' shape (18x38 rectangle 2'radius corners with dual roman steps) 3) how does the top handle position effect how it moves.