I put the spare two 202's away. They show up in OBiTalk portal as 'offline'. I believe they (PP) won't/don't allow more than one MAC address, but I'm not sure. I tried to ask, but it was side stepped, so I don't know. A while after I contacted PP, and had them remove the now stored unit and enter the active MAV, in less than an hour, I finally got it re-registered.
No, as long as this one stays 'Registered', I don't plan any changes since the one that is active is working.