Thanks for sharing your HDS experience with Viking's steel bungee.
It would seem perfectly centering a 1-3/4" inch hole saw would chalanging given the center offset 2 hole design. If you had to do the installation over, what would you think to be the best way to remove the top cap.
Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.