Paul , thanks for that. I would say 35mg is best left for the fliers, as IN THEORY, if one was flying nearby and you were using a 35 for a purely ground based vehicle/boat/thingy then it might be possible for you to jam their signal causing a crash and killing someone (!). Not that I have noticed any fliers in Bushy Park, but u NEVER KNOW. I would have liked shorty to at least hop off the water, but you need massive power to lift off from the water, and that would severely limit the normal endurance floating around with the other boaters & avoiding my son and his aircraft carrier . As it was not designed to fly and has no flying controls….a boat it is. The German WW1 flying boat I built for the lad is even lighter than shorty but still refuses to lift off the pond ! ( see my gallery) Ashley