I am currently installing all three antennas (marker beacon, transponder, comm) on my Legacy project.  On the carbon fiber aircraft such as the Legacy, the builder's manual does not mention installing a "ground plane" inside the fuselage.  For those who are flying and have NOT installed a ground plane (such as copper mesh), how is the performance of your avionics?  For those who are flying and HAVE installed a ground plane,       1.  How large were they?
      2.  What material did you use?
      3.  How did you attach them?
      4.  How is your avionic performance?

Since this is not addressed in the Legacy construction manual what do I need to know?

Thanks in advance!
John Kleber
N83JK   LEG2/G