Here is a detailed look at what I'm writing up to machine various parts for the engine. In this case I'm working on the "Venturi" for the needle valve assembly. The ML Midge prints also show a rudimentary spray bar that doesn't have a valve seat, so the modelenginenews.org site suggest altering the "internal design". Let me know if you think this style of writing up the sequence of operations makes sense. I'm doing it to plan before I get too far and cant finish a particular part.