Actually I am wondering the same thing. I just wired in a RainBird in place of my OSPi as we are renting the place and it will be more familiar to contractors. I did a dual-box installation where I am interested in leaving a RasPi in place for flow monitoring and wondering if I can just use OSPi vs. a custom solution.
Curious if anyone’s done any mods or observation in this area?
FWIW from my prior experience when the zones are running you can see deviations from prior usage.