Here is my attempt to help you. Yes it's worth buying the dvd that's devoted to that single trick. Because anytime you have a choice of learning something from a lecture or multi trick dvd or a single trick dvd, I say go with the single trick dvd because that's your best chance of learning all the nuances of the trick helping you master the effect more efficiently. And whenever I want to master a effect(bill in lemon for example) that is part a larger plot(impossible location in fruit). I obtain almost any and everything related to it. In other words, if I really want to learn how to wave the aces, I would buy a several different tricks on waving the aces to get all the nuances of the trick that I can possibly can get so that I have options. Lastly, it says that both of his lectures do indeed have the trick inception and they both don't say performance only meaning he teaches the trick on both of them most likely.
