I just saw the iFly720 at OSH, and one thing occurred to me. It would be nice to have a warning on the screen when the power is interrupted. While the power capacitor holding power for a few seconds is a useful feature, it won't help if you aren't aware that the iFly has lost power. If there was a warning (perhaps a voltmeter, or some obvious message) it might give time to jiggle one or more of the power junctions and correct the issue.