Cut the antenna in half on the GWS receivers..... It's a technique arrpoved by GWS for decreasing interference. I have half a dozen GWS receivers with half an antenna, and one with a coiled 5 inch antenna on a cocktail straw. Never have a range problem because no one I know flyies a small ship far away enough to have a range problem, and I even fly some of mine out with the glow planes.

The new FMA micro receivers are not much bigger than the GWS micro receivers, and they are dual conversion and 5 channel.