" This was my first effort at building an engine"
Not sure whether to comment on that statement or the result … either way, please stop it. The usual standard of build on this forum makes me feel inadequate, that just makes me want to give up!!! Far too many plusses – ambition, planning, innovation, fine workmanship, persistence … the list goes on. A natural entry to Sir John's Trophy, I would have thought.
Oh, did I mention, I'm quite impressed! +++
rgds
Bill