Mounted both the Transponder and Comm antennas. I needed to add skin stiffners to the comm antenna which I mounted on the top skin at the rear of the baggage compartment. I set part of the antenna at the baggage rear L angle and added an additional L angle behind the antenna horizontally. In addtion I have a large grounding plate sandwiched in between the antenna and skin. Raido sends and receives perfectly, even from within a metal gargage.
The transponder antenna followed the same procedure but is on a smaller scale. The transponder antenna I mounted on the underside of the fuselage and just rear of the fuselage access panel.
