Wonderful packet trick, I bought it the first time in 1976 from Paul Diamond, in Hollywood FL. He didn't think I would be able to do it hands to rough, I was a carpenter. Worked hard on it got it down went back and showed Paul, then spent the weekend for the next six months learning more about cards from Paul at his shop. Funny guy, was hard to get to know but once he saw you put in the time would go out of his way to teach you. Miss those days. Lol the packet trick is basically twisting the ace I've always enjoyed it. It's a bit longer but well worth learning.