Hey Bob, I just wanted you to know I for one am interested in the experimental side of EAA (unlike some others who need to stick with certified rigs)and have flown behing a 2 stroke, I was a skeptic but after selling it and aquiring a "reliable" continental powered aircraft, I have realized that all that reliability hinges on the owner. The Rotax I flew with is a reliable design and after I purged the previous owners influence on it it was a fantastic engine, but I was swayed by the crowd to get a "real" airplane and engine. The Continental failed at 75 hrs, less than 200 since major once again the previous owner's influence not the design. With my practical experience having flown behind one and having done all the set-up and maintenance, I say the 2 strokes are a fine choice for a lightweight powerplant. As long as the EGT's are monitored during tuning and proper maintenance done there is no secret to the 2 strokes operation if you run it lean it will melt.