I am very close to making a decision on purchasing a 12 zone Rachio. I’ve done extensive research including the Orbit and Rainbird alternatives and I think the Rachio is best for us. My only last issue is that my wife would like to be able to shut down watering from the box and show our lawn service how to do this from the box in case our wifi is down or we decide not to let them use our wifi. So it would be great if they or she could just do this mechanically from the control box that will be mounted on an exterior wall (where my current Rain Bird is now). Is this possible?