Whoopi! My Cooper is back, and it is running great once again. Two main problems were found; one valve was much too tight (why? Let's hope there won't be a sequel to this episode) and there was no damper oil in the carb.
Come to think of it, they let it drain at MiniSport when the car was
there for a rolling road tune, but we never saw them fill it back up
(in al honesty, rolling road tuning wasn't this guy's regular job;
something went wrong with the appointment, so they had to find a
replacement).