Now I’m happy with my boring setup, I’m working on the big end for real. Setting up the rod on the Bridgeport is probably the hardest part, as it takes ages to get everything straight and level.

The Mk I eyeball isn’t accurate enough, so it’s a job for Uncle Ernie’s clock. One of a few things of his I still have. The rod is a bit thick at the bottom so will need finishing to the bearing width. I’ll aim for the same bore diameter as the bearing is a good fit in the test piece.

A bit nerve racking as a lot of work has gone in so far, and it’s so easy to muck things up – especially bore diameters!!