Interesting. I know higher altitudes will affect gas and nitro mills, as the air is less dense, but I wouldn't think electronics would be affected by elevation. I would figure the main limiting factor for them would be the ambient temp. To high, and things overheat quickly and tend to let out the magic smoke. To low, and things start working sluggishly and gyro's don't like to initialize in the cold as much as when they are warm. It will be interesting to hear what some of the more electronic savvy folks on here have to say about this.