Yes–multiple areas of vegetation, some with shrubs, some with grass, lots of gradations of shade between the different watering stations. Some areas of grass are mostly shade, others full sun all day. Same for flower beds. Yes, all of your solutions would work, but for your system to run with the most watering efficiency, it would make sense if you made that small software modification to treat both stations as one every day. Some days the watering would be done for all stations in two hours, others in 6 hours, and there would be zero overlap and the watering would be completed in the shortest possible time… It just makes no sense to me why you wouldn’t want to do that sort of software upgrade. You would sell more controllers to individuals who have more than 16 stations, because right now they probably look at your system, and say, "I think I will buy this other controller from this other brand (not Rachio), because I can link multiple controllers together so that they function as one controller. Hunter makes a 24 station controller (Hunter Pro-HC 24 station controller) that does exactly what the Rachio does–predictive water control, web based. Hunter also makes smaller controllers (modules of 4) where one can install a 4 station controller, then one can add modules of 4 stations so that the entire system can ultimately function as one 15 station controller (The Hunter Pro-C Indoor modular controller) without having to buy a new controller with more stations. Rainbird also makes a modular unit where you can tie multiple controllers together to function as one (The Rain Bird ESP-4SMTE 4 station Units). One can start off with a 4 station Rainbird modular unit and add more 4 stations controllers which function together as a large unit (in multiples of 4). This system also has predictive weather technology in determining how much to water each station each day. When it comes to making multiple controllers into one, and to having the ability to do what you do with more than 16 stations, Hunter has you beat, and you are probably losing sales to them. The same is possibly true of Rainbird since the multiple units can be combined into one larger unit for programming purposes.
