OK Tel - but if it's a stationary engine, how can it be "Moving right along"?
Actually a marine engine so the metaphor is apt.
Rod, yes to the ball nosed end mill (3mm) but I didn't just the dividing heard due to the lack of a tailstock (yet). Instead I used to old dodge of screwing two short pieces of hex to the ends and grabbing the bundle in the vise. I'll set up a couple of pics later, if time permits.