On May 17, 2016 at 19:24, markrubin said...
2. Yes you can have more than one program: so you can have 3 phones run a program and one phone run another program from XP3
Mark is correct, though the XP-3 isn't really meant for even medium size projects, you may find that it ends up being overloaded.
Would probably be worth looking at an XP-6.