A John Davis, from Indianapolis, I think, was active in Midwest stunt circles in the late 70's at least. Unfortunately, he passed away a couple of years ago. I think there was an obituary in Stunt News. He had a design called the Arrowplane. The two I saw were white with black trim. One had retracts powered by a battery on John's belt, through insulated lines. One folded a wing, at St Louis, I think; don't recall which one. I was impressed by the airplane with retracts.