If you are responding pertaining to the opening in the rear for the stab, then I wonder if you have ever seen this plane.
There was nothing there to glue the stab to, nothing but the 2 sides of fuse. If you somehow managed to glue the stab to it, it would not hold very long. I don't know about you but I would rather have my elevator intact during flight. Without building it up the stab would certainly seperate from the fuse in a quick manuever. The opening by the way came nowhere near matching the stab. With the stab in the hole, I could look from one side and see clear through and look around the room through the hole.

The other thing you might be replying to is the rudder servo mounts. Same situation, I certainly would not mount a high torque servo onto 2 small blocks of balsa glued to sheeting. I do not think that needs explantion, quite obvious I think.

I do understand that the 3D stuff is suppose to be light, lighter is better and I have taken every opportunity to keep the weight down.
Right now without Muffler, wheels, cowl, and canopy its weighing just slightly over 4 lbs.

Keeping things light is no excuse for crappy assembly, this plane must have been built on Friday by the biggest stoner in the shop.

Dbow