Numberless are the methods designed to solve this problem: "center tears", window envelopes, "umbrella moves" or billet switches. All these methods, in my opinion, have a great weakness: the mentalist must repeatedly touch the billet. With that in mind, I looked for a method to avoid all this "manipulation" and that would appear as real telepathy.
What I am going to reveal to you, I think is a good solution and it served me well since I came up with it in 1976.
It has passed the scrutiny of many different audiences and many "in the know" such as Frank Garcia, Tony Spina and Tony Slydini, to whom I showed it at the "Tannen Jubilee" in 1977, giving me great satisfaction.
Once read and practiced, you have a surefire effect in your professional repertoire and, most of all, you will be able to perform it anywhere, anytime, without using any electric/electronic device or stooges of any kind.