Well, a 2nd ET-1 has been modified to fly on short lines indoor, and it worked well too. Looks like a completely new design isn't needed.
![Smiley :)](https://stunthanger.com/smf/Smileys/classic/smiley.gif)
We will see how the kids do with them this weekend at the AMA Expo. More word as the situation develops.
BTW, Tim W, any word from your nephews?