I love it! Even with the wind, it looks sort of like someone invisible walking along pulling their balloon behind them.
I think I mentioned doing the trailing string in the sneak peek you posted, but seeing the Axworthy setup, I think you'd be smarter to avoid having that at all since it could become a tangling hazard with the Axworthy points/motor when it passes by. And a dangling string would be likely less visible anyway at night - the MAIN thing is the red balloon itself and THAT shows up beautifully.
I wish I could do stuff like this. And before you say "anyone can" I am apparently the one person on the planet that can screw up the most simple of mechanical/motorized props...
I rely on other people to build my ideas or just buy premade. I am so impressed with people like you that can set this stuff up with a little trial and error and look as good they do!