Well, time to make some changes. Added another Harmony Hub today and scratched my head for a couple of minutes as to why I couldn’t select 1 of the activities I created. It was tucked away on the 2nd page of Devices in the IDE. Didn’t even know I hit the 300 Device limit. 
Guess I’ll start with any Virtual Switches I don’t need and some also some of the 30+ Echo Devices!
