Jim, I'm not anxious about experimental engines in general, I'm almost certainly using a Corvair, but I'm not at the decision point yet. Jan Eggenfelter left a bad taste in a lot of peoples mouths. Just for that alone, I would be very hesitant to do business with him. As I said, I really like the premise of the Viking engine, really, I do. the difference between it and a Corvair is the large body of experience with it. The problems are, for the most part, known and addressed. Another important point is that the Corvair is frozen in time. It's a bit counter-intuitive, but automotive engines are changing rapidly and there's a chance that new versions of an engine can introduce new problems. The Corvair is a known quantity.