This has been requested so many times, I wish ZWO would listen to their customers, even if they want to charge an "add-on" fee or something so that they don't feel like they missed out on selling something. It's not that people don't want to buy another box it's just that having multiple AAPs doesn't fit everyone's purpose. I myself would like to mount my DSLR on top of my telescope so that I can take Milkyway shots while my main is doing it's thing (with dither of course), so buying one or two or three more AAPs wouldn't help me do what I want because they would not be synchronized. The solution is one APP to control both cameras.