Smoke and Mirrors by Simon Aronson Page 35 et seq.
Personal Comment: I love Sandwich effects. Somehow this seems like a fulfilling climax to almost any "sandwichy" routine. And it is fairly easy. But it takes guts to do it. Serious guts! I can see it not being performed because some will think that this never works in a real performance. I tried... it does. It's good. I love it.