Hi Anthony,
thanks for the valuable insights of legendary record!
You said that you were not happy with any of the Masters that came back. Did you try out further Mixbus processing / Mastering yourself before committing to the final version? And has your approach changed over the years, or do you generally leave the Mixbus as minimal as possible? There are so many great Plugins out there by now, that I always feel it is very hard to resist to not put them in action.
Thanks!