ace, I read it. Take a look at your Direct TV antenna. That concave surface is called a reflector. Under the gray paint is a very thin coating of copper. All it needs to be is an electron thick in order to work. That copper coating reflects the electromagnetic wave coming from a satellite into the pipe looking thing in front of it called the feed. The antenna works because the signal coming from the satellite is reflected from a metallic surface. The same thing happens with the metallic coated RC models whether they are coated with metallic paint, tape or are all aluminum. No body doubts that the metallically enclosed antennas work. They are working because of leakage. Nothing is a perfect seal. The problem is that the margin of operating the manufacturer puts in to his system is considerably reduced. Just because it happens to work in one type of test does not mean it is safe to fly with. Just make sure you don’t fly near the pits. Dan.