This may not be the classic brainwave. I got tired of rough and smooth and not being able to show the cards.
So I came up with a way to cleanly have the deck rubber banded--it is not in a box. No flipping of the deck. They name ANY card. without any flipping of the deck, you slowly go through it all. only their card is face up. next, you can show all the others are all one way, one their backs, and you can fan through and show all of the faces in their entirety cleanly.
This way, it is shown cleanly and you can do a swi..ch if you want to after the heat is off. very clean my dream trick. I hope to market it but it is probably too tough for the average magi to make; this is true of manufacturers as well.