This doesn't really answer your question, but it does apply to the trick.
I loved this routine, i think it had everything a card magician could want. But the only thing i didn't like was Bro's presentation. The whole trick was based on a deck switch. And i believe this pretty much explain the trick.
While the explanation is an impossible explanation, it's still an explanation nonetheless. When the audience goes back in their head and think about the trick, they will think "Wow, he has really fast hands to switch that deck so quick."
Then the routine turns into a slieght of hand demonstration, not magic.
My presentation is that I used the Marked Cards plot all the way through. At the end, instead of saying i switch decks, i simply say "So you saw how i did that right? No? Well your card was marked. I thought it was pretty obvious cuz you're card is red, and all these cards are blue."