Let me know how your UFO turns out Spaceclam. Can I ask how your doing the electronics? I'm working on a Ufo project myself. My design has an inner ring and an outer ring. The inner ring is for the propulsion and the outer for navigation. Since I work on gyros for an avionics facility it gave me the idea. I will probably use the new Draganflyer board that is due out at Spectrolution and attach
it to the non spinning portion on top of my saucer. Then use 4 small micro motors in a duct config.