Winding back a little, I've just been looking at your comm. antenna in the fin. Wish I'd done that as I've seen it on another thread (forgotten which). The ability to get great VHF coverage will be a real advantage. I remember many years ago on a flight to Singapore spending some time in the cockpit of a 777-300ER, and with all that wiz bang stuff they had, the VHF radio was still a bit iffy, even for them, and we weren't that far north of Perth (In Australia) which was the area ATC. So even the big guys don't necessarily have great reception. So in short, good thinking and I enjoy your build thread.