I finally installed my OS3.0 DC-powered to replace an Orbit 57592 (12-station model, 5 in use).
Only thing that gave me pause is that the Orbit didn’t have a rain sensor input, apparently they may have wired that in to the common bundle (hidden behind a drywall by a previous owner).
So for now I have disabled the mechanical rain sensor, connected the 5x DVF wires to #1-5 and all appears to be working. Next is to start playing with the different rain algorithms which might(?) render a mechanical rain sense as meaningless anyway… along those lines, other than searching forum posts, is there a detailed FAQ to explain Zimmerman vs. ETO vs. ….. (even better with examples). Personally I don’t trust forecasts (they consistently seem to mis-predict rain for us).. but I would be perfectly content in reducing watering b/c the “back-cast” knows it rained last night….