I am not convinced by the provenance history of the VMS

[JustAnotherTheory]

Yes this is the point, for the forgery theory to work you'd have to say he somehow found unknown parchment which he guessed might be from the 13th century but was actually from the 15th century, then wrote/drew various things on it that just by accident were all consistent in subject matter, composition, and materials with the 15th century. Even though he wanted the forgery to look like the 13th century. It's nonsense.

The whole point of a forgery is to deceive. If you are convinced that the VMS is a medieval document, then the forgery is a success.

Let's not forget that before the carbon dating came out, most experts DID NOT conclude that the document was from the 1400s. Many medieval scholars thought, based on the drawings style and contents, that it was from at least after the 1500s.