Have a duplex which is going to have separate sprinklers for each half. Would like to install Hunter Pro-C controller, or equivalent, and I have a few questions: 1. If you install 2 controllers within 20' of each other, will you have any problems when you use a remote control? Are they "coded" or will it be turning on whichever one your closest to? 2. If you have wireless rain sensors, is there a way to utilize just one, and interrupt both controllers? Thanks!