Lots of lessons learned. For example, indoors versus outdoors tend to play VERY differently and have different needs. This means that indoors you want immediately useful information, it's not as useful to (for example) know which team is winning by exactly how much. It's more useful to know who is winning RIGHT NOW so you know what you should do RIGHT NOW. And other little usability things. Details matter.
I have been developing but it takes turns with other commitments.
The hardware I posted about is running games very successfully at Capital Airsoft's indoor facility in North Edmonton.
That looks like a nice successful test