This is a great trick. The video has nearly 3 hours of different tricks with this. The first part of
the video covers a dozen or so different moves used during all of the routines. I found this very
helpful. The moves were generally pretty easy and effective. Some I'll apply to other tricks--e.g. a
nice bottom card force.
I do wonder: if the spectator signs the button card, and we
eventually need more button cards, are they alone available.