I am impressed with the tools that can be brought to bear on a professional rebuild.

Packard built the Merlin engine and I recall a story where the chief engineer for Packard told his counterpart from Rolls that they had to re-dimension all the Rolls Royce drawings. Couldnā€™t build to our accuracy the gent from Rolls surmised? No, not enough accuracy for interchangeability..... This is some kind of engine for 90 years ago......