RE: F-4C Phantom - Pavel Bosak
As you can see by the first picture, the fin is built of sticks with sheeting on both sides. It has a spruce spar sticking out the bottom that keys into the top of F7, which is kind of a "spine" that forms the basis of the tail structure aft of the last real former, F6. The rudder is balsa sheet, tapered towards the aft end.
The fuse on the F4 is such a weird shape that it has to be built on a jig. I'll be cutting the formers and setting all that up today.
These plans are drawn for metric balsa sizes, which I can't get, so I've been converting to the closest fractional equivalent.
I didn't mention it before, but this model is a prop in the nose, and Pavel didn't give it air intakes, as he wanted to reduce the drag.