Dudely,

If you are planning on big power I would urge you to cut unto the bottom side of the stab. Once in there you can epoxy each rib to the rod, CA each rib to the sheeting, glue tha back side of the elevator hinges. I am also going to add some light ply formers between each rib. I also would not use CA hinges.

Also, I would suggest to seal all hinge gaps with tape or untracote.

I am also really thinking about moving the elevator servo back there. There is a perfect place to mount it about 3 inches from the control arms. Then fab up a short "Y" out of 4/40 threaded wire. I have never liked the stock setup with the big long balsa pushrod. I really don't want to add tail wait, but with an OS 160 I have a little pwer to spare and will consider adding some weight to the nose to balance out. Still thinking about this one.

Also. make sure you sand the fuselodge real well where you epoxy in the bulk heads. I talked to Steve at ACE today and he said he has some reports of folks that have had there bulkheads break loose.