I have not flown the G&P plane, but the one I saw looked nice.

Im not sure about the gear doors.. I'm not even sure the one I saw had gear doors on it.

What issues have you had with the OS91FX ?? The one I had to do muffler testing on ran very pretty well. Really came alive with both the turbo-jett and jett-stream mufflers installed. Both exhaust systems put a 13x6 APC well over 12K rpm. Idle was very good.

You may want to start with that 14x6P and clip the tips 1/2" or so. Even with the stock muffler, you want that engine up over 11.5K rpm for this type of application.

Is there any chance you can provide me a couple of photos of the engine installation on the F-18? Id like to get an idea of the space available back there. There are only a few photos on the web site, and none really show the business end.

Bob