Testing of the prototype #2 went well today. I can say it is exceeding my wildest expectations. It is really torquey and revs bigtime and it tunes like an OS. If the weather holds out I'll try to get some video available by next weekend of some runs of the prototype so you can see for yourself. An interesting thing is the engine has better compression when its hot than cold. Most engines tend to go the other way. The piston expansion rate is working very well.