Based on one of Elmer's designs my first crack at something that isn't a tool or accessory for the lathe etc
This engine is completely scratch built from barstock without the use of castings. There are also no drawings besides the design the engine is based on so things are a bit "fit and see".
To give you an idea of scale it is about 6 inches from bottom of base plate to table, and the flywheel is 3 inches in diameter.
Close up of the big end.
Close up of parallel motion workings.