I drilled a hole on the bottom right behind the wing mount, inserted a piece of fuel line, ran the antenna out through the fuel line then took a T-pin and put it in the fuselage as far back as I could. I put a rubber band over the t-pin and stretched it a small bit, ran the antenna wire through through the rubber band and tied it, then let any extra antenna hang out in the wind. This setup has been in place for over 500 flights with a single problem. The rubber band allows the antenna to give a little

If you used a different tailwhell such as a sullivan then just wrap the rubber band around the mount for the tail wheel. You cannot do this with the stock tailwheel

You could also run it out the top by drilling through the former right behind the canopy and shoving the T-pin in the vertical stabilizer