> Over the years, nearly everything on the vehicle has been replaced or repaired, and Campbell says the only original part is likely the body, and even that has had work done on it.
aka
This is my grandfather’s axe. My father replaced the handle. I replaced the head.
In the UK we call this Trigger's Broom https://www.youtube.com/watch?v=56yN2zHtofM
Maybe the axe exists as the interface point between the pieces. And the history logbook.
Ship of Theseus