So here is where I'm at currently thanks to your input...I figured I could mask the tail end in order to peel back the covering with the tape acting as a stop. Then, Im guessing, cut out the section that has been masked, install blocks and reinstall same piece, or new piece depending on how it comes off.
OR being that I would like to avoid cutting pieces out of a new, covered frame.....
I could also drill out holes along the tail and glue in dowel rod to add depth for point hinges(Robart type). If I go this route... what would be the best way to glue in? CA would be ideal as it would just soak in, but would that really be enough to hold? If I used Epoxy or Gorilla Glue, most of it would come off when inserting the rod into the hole.
The "X"s in the pics mark where there is a former of what seems to be 1/8" ply. The rudder seems fine as the leading edge seems to be tristock all the way up.
Thanks Joe for the pics. Ive used that method previously on a rebuild I did of a Funtana a couple of years ago. But in that case I had the plane stripped to the bare frame which made it the best method. Here, Im trying to avoid stripping the tail down and keep the covering intact.