@Videoguy, great to hear! The wiring for this rain sensor on a Gen1 is below:
The wiring for a wireless rain sensor on a Gen2 is below:
As such, the wiring on a Gen2 for an Orbit wireless rain sensor will be:
The green wire is NOT needed.
This is a personal preference. If you're in a humid area, I'd recommend you stay above 1/4". Remember, the Rachio allows you to turn on a virtual rain sensor via Weather Intelligence the app.