Take your time, I'm a patient guy. It's wise of you to do the extra work to get the molds AND the airplane.
Yeah, I was going to mention, a rear exhaust mounted inverted with the pipe down the tunnel is the way to go. That way the engine doesn't spoil her good looks. There's a fiberglass piece that runs down the top center of the wing making the top of the pipe tunnel. A "clip" is then installed so that the pipe can be secured to the wing once the wing is screwed into the fuselage.
EDIT: LMAO, those pictures in the above post look remarkably like my airplane!!

Anyway, you can see what I'm talking about.
PS: She's kept a lot cleaner now!! (still has the same engine). Shame on you! I'll have to get you some more recent pics. Showing her all filthy like that, no excuse! You should be ashamed! [sm=spinnyeyes.gif]