review link: https://www.youtube.com/watch?v=Ck8thWIFzCE
THe Gamblers are a never-before-seen concept in Gaff Playing Cards. These are precision made gaffs for use with Black Rounders and Green Dealers, to enable you to perform effects that would otherwise take a lifetime to master. Every single card has been carefully thought out and designed by Daniel to fly under the radar, enhancing your skills and making you seem like a master.
Purchase: http://www.ellusionist.com/madison-gamblers.html
You say that the double face cards can be used for more then just Black Rounders and Green Dealers. While that is TRUE, it's only because the differences in court cards from one Madison deck to another are subtle enough not to be noticed by a spectator. It should be noted that the court cards do change from one Madison deck to another. It could be a subtle court upgrade or a completely different persons face.
You are correct, however I still stand by my statement. The "differences" are subtle and in the cases of DFers you would "remove" from your deck the "matching cards" so unless someone has memorized what the courts look like in each Madison deck, ...you're safe.
Oh and if you know someone who HAS memorized what courts go with which Madison decks - don't show them any Madison magic tricks.
Just a heads up
Guys, it's not a major issue. Most people wouldn't notice if you swapped a Jack of Clubs for a Jack of Spades - they simply don't care that much about cards to remember the precise appearance of each character.
I do a trick with those old Streamlines that I'm nearly out of where I magically swap cards with the spectator while their card is being held between both hands. The jokers have the same faces but DIFFERENT indices - both say "JOKER" but one has a circled star above the name. I used to take the effort to swap around jokers from one deck to the next so they'd have matched pairs, but I just let it go once to see what would happen. Sure enough, the spectator identified the joker by the artwork on the face, not by the index. I'd done the trick without swapping the cards and using different indices hundreds of times since and I've never been caught at it once. Someone tried claiming I was using two identical jokers somehow to pull off the trick (after I'd already returned them to the tuck box) and I simply showed them how the two jokers aren't even identical, pointing out the difference in the indices - again, he had been so focused on the art that he failed to catch what I did, allowing me to use it against him not once but twice!
In simple terms, there's a helluva lot you can get away with in magic, simply because the spectator who doesn't know what's going to happen will as a result not have any idea what to observe or remember. You'd have a tougher time getting away with it with naturally observant people, particularly law enforcement or military, because they're trained observers (but even they can be bamboozled now and then)!