RE: 1/4 Scale Pfalz DrI
Before joining the halves, I made a lamination of 3 layers of 1/16 ply with a wire for the tail skid embedded, and mounted to one half. The same plate will support the stabilizer. Then I glued the whole business together with a second plywood "full" firewall, to tie together the "half" firewalls that were butt joined together.