Hi Richard The one's I saw were glow not electric. If you have a look on youtube there are one or two examples on there. These do have a higher second aerofoil than the ones I've at the Nats. In addition they appear to have a counter weight coming off the main aerofoil at 90 degrees, again those at the Nats did not have this feature. Good luck with your home design, would you be willing to share the plans if it works?