My three engines, the first one I built was Elmer's Beam engine (the small one in the front), I can't believe how tiny it looks compared to the one I have just finished, the Bolton 12 at the rear. On the right is the second built engine Bernay's, a twin cylinder that is self starting in the fact that one cylinder will always be in the starting position. I hope that the improvement in my limited skills is self evident. Cheers, Peter. Here is the link: https://youtu.be/x4ZBOIPsBbU