Question for any landscapers/irrigation guys out there: I have a situation where I have two Orbit sprinkler timers controlling a total of 12 zones spread across them.  I want to install a single automatic rain shutoff that shuts off both controllers in the event of rain.  Is there a way to do that without having a dedicated rain shutoff for each of them?  As I recall from the last time I installed one of these guys, the shutoff is basically a switch on the common wire. Could I possibly bind the commons from both timers, route a single wire out to the shutoff, then back and split them out again to each timer?