I have seen and held this engine. Having looked at the specifications I believe they still have qute a way to go. It is a beautiful engine, the machining is not as good as a DA and the weight is a bit more than what I hoped for before we recieved them. I see a couple of issues but I am not an engineer so what do I know. The head is held on by 4 bolts they apear to be about 3/16" and the RPM range is very limited. In order to effectivly use this engine a variable pitch prop will need to be developed.
They are headed in the right direction and as a first engine it is fine.
Steve