...my homemade GS antenna is a simple strip of aluminum, 1/2" wide and 16" long, and fiberglassed onto the floor of the inside of the right wingtip. It'll stick straight out horizontally as possible, the outboard tip tilted aft slightly and not quite perpendicular straight outward to the end of the wing in order to fit it inside the wingtip. If 16-18" of stripped coax works well for GS, then I figure that a same length strip of aluminum ought to work as well too, since there'll be about an inch or so of stripped coax from where the shield braid ends to reach the screw post connector I made on the inner end of the antenna strip. I'll be grounding the shield to the rib at the end of the metal wing and the aluminum strip antenna will start with a couple inches of fiberglass separating it away from the wing. .