I also recall Donald Trump Jr talking about a D5 cat during the campaign, perhaps it was at the Convention. Odd. I think he was talking about knowing the people who work for you and what they do.
Now THAT is fascinating.
Junior may have mentioned a D5. I sort of do remember one of the boys mentioning a CAT D10 and knowing how to get it started, etc. It was part of experiencing first-hand all components and phases of a construction project. Obtaining street cred.