Ace location
Here goes an idea. Effect: four aces are located in the order chosen by an spectator. Method: start with the four aces resting on top of the deck in CHASED order. This fact must be known by the you but unknown by the audience. The spectator names one of the four aces and: A) if the top ace (AC) is named, riffle shuffle controlling the stock à la Erdnase, adding one card to the top and go to B. If any other ace is named, you can go straight to B. B) use the Stevens Control to riffle shuffle, cut to the right ace and complete the cut (make sure that you don't disturb the stock). Leave the ace on the table. If you have followed the instructions, one random card will be replacing the named ace. Double undercut the ace/s that are on the bottom to the top of the deck using the Vernon Shuffle Transfer and you are all set for the next ace. Tips: * Check out the description of the Vernon Shuffle Transfer in By Forces Unseen. * The number of cards that you need to transfer to the top depends on the last ace that was named. 4 for the AD, 3 for the AS, 2 for the AH and 1 for the AC. Any questions?