Steve, I can consider you a friend for letting me know this. I have just finished mine and was suspicious of this arrangement from the start. I think that adding the correct size of inner nyrod tube instead of the standard arrangement would solve most of the problem. I plan on doing this before flying. I am interested in what others have done here. One question, how did you arrange your exhaust outlet with the 1.2? I have been working on getting a little more bend out of the stock manifold pipe for my Saito 1.5, which powers the plane below.