I,ve got dissapointed whith this one. I expected another method. First, it,s too risky to relay on
the person you perform for in order to put the card, face down, of course, inside the box, but, on
the other hand, you need that as a misdirection to do the change. Second, it,s not easy at all to do
the change without looking what you are doing. All in all, I do not recommend this one.