I've been working on this trick for just a few hours total. So far, it's pretty rough. Nothing near as good as this version. I find my sleight at the critical moment flashes a bit, makes a sound (much more noticeable with the new pack of cards I just opened), or simply takes way too long. More work is needed before I can show this to an actual audience. But I'm going to stick with it because I simply love the effect. It's delightful.