I decided to add the Dynon ADS-B IN capability box now, while I'm working on the panel. I had thought I'd save some money and add it later. But I think when I'm done with this airplane and it is flying, I will be done building and into flying. So no more additions.
Anyway, I had to add another antenna for ADS-B in. I put it accross form the Transponder antenna. That is about 45 inches away. Spec says stay at least 24 inches away. So good to go.
I had to cut away some of the sound proofing material. This stuff really sticks. Then make a backing plate. Rivet on the backing plate.