I have ~1 yr old IGP and spill over spa and want to add SWG....I think. I have done a ton of research here and found lot good info as always. I am leaning towards a AquaRite because I like the separate flow switch. This is because I want to install flow switch at the pool return so I don't over chlorinate the spa when I am using it is stand alone mode. Otherwise I was thinking a Autopoilot, they are integrated right? I am pretty handy and think I can install myself. Am I worrying too much about the cell kicking in and over chlorinating the spa if I go with a AP digital? I don't care about bells and whistles (timed lights etc.) but any advice on what level options I should get ? ( I am planning on getting larger cell). I also think a salt level readout would be beneficial. From what I can tell none of them self adjust duty cycle of the cell to adjust CC level do they?