I said so on Twitter already, but congrats again, and man does that deck look pretty, :-).
Did you see the Mentor-DPS deck that finished second in the MODO Vintage Challenge this weekend? http://magic.wizards.com/en/articles/archive/mtgo-standings/vintage-premier-2017-04-30. Looks like the differences vs. your build are +4 Mentor, -1 Dark Petition, -1 Tendrils, -1 Hurkyl's Recall, -1 Cabal Ritual.
Did you ever want access to Mentor in your tournament?