I’m considering installing a SWG for my mother’s 13,000 gallon pool. I think I have it narrowed down to the Autopilot Dig 220 with a PPC4 cell or a CircuPool RJ-60. The CircuPool has a 7 year warranty, and claims it can produce 3.1 lbs/day, for $1,099 shipped. The Autopilot has a 2 year warranty and claims it can produce 1.92 lbs/day, for $1499 shipped. Comparing the reviews and specs alone, it looks like CircuPool should be the winner. Is there anything else that I am missing?