Overlapped? Wouldn't that let the seats burn, that is if a few months lapping didn't see you through to the entablature?

Dear Gordon,
I just had an occurrence - All of the bearings must be checked for "settling". At 20rpm, deformation (flattening) may not be apparent, but if you intend to refire the engine, principally all the white metal bearings may have to be replace, quite a major consideration.

Rgds.
Dave

Thank you Dave - good feedback. I will put the warning in the lessons learned document that we have created for use by future generations. I doubt that anybody will be looking to refire the engine in the medium term - but you never know. We do actually have two big end bearing caps that have not been used since they were reconditioned with fresh white metal. Found some other interesting spares under the wooden walkway in front of the engine too. A bit of a treasure trove - and I will be pulling some out to clean up and display.
Thanks - Gordon

It wouldn't be too difficult to fire up the engine, two things are required; big cheque book and big balls.