The way Skymaster avoided interference with the stab mechanism is to make the pipe nozzles very close together, in fact they are so close I had to modify the fiberglass exhaust cones. The ply ring inside of them pretty much has to be cut out and I'll have to make a new one.

If you look from the top you can see that I had to sand about 1/4" off the fuselage side to get 1/8" at the ends. This means the fuselage part is actually angled out, so you can tell when you know what to look for, but no one will be able to tell. When I get the pipe installed I'll take a picture of how they exit the fuselage, you will see what I mean by close together.