Congrats Russm,

I have an O.S .91 with Bisson Pitts muffler on it and its my new favorite plane. On another note, I was looking through my collection of spare parts, etc, and notice I have an unused OS 91 VR DF and pipe. I am wondering if anyone has thought of using this type of setup for this application. One of our field members uses a ducted fan engine with a pusher prop on antoher plane, and it really hauls. Just a thought.