
Unfortunately I lost my first, well worded response, so we'll try again...
I think you're over-complicating the routine and more important, you are leaning way too much on the same principle which will weaken the effect in the long run.
If I were you (and not knowing the actual routine or effect you're after I'm doing some assumption) I'd look at using a handful of techniques including the classic "fill in the blank" (Swami or PW) course of action, maybe a one ahead or behind sequence and other "switch" type methods like the Banachek portfolio, a Himber wallet type arrangement, Ted Lesley's TELEPORT Envelopes, etc. But I will also remind you of a little something when it comes to the creation & performance of mentalism (this is for everyone's benefit, you're just lucky enough to be the person that opened the door of opportunity to it.)
The Principia of Mentalism
{a.k.a. Bob Cassidy 101}
1. Plausibility Depends On Context (Or, As Annemann Asked, "What Would A Real Mindreader Do?")
2. If Your Only Theory Is Trickery A Mentalist You'll Never Be
3. No Effect Is Plausible If The Context Is Wrong. Conversely, Anything Is Plausible In The Right Context. The Trick Is Figuring Out Which Is Which.
4. If More Than One Subtlety Is At Work, Your Method Is Well Concealed.
5. Varying Your Methods Keeps You One Step Ahead Of The Magic Boys
6. To Err Is Human, It Makes Us Seem Real, But Err at the End – You’ll Look like a Schlemiel.
7. It's Not What You Take With You That Counts, It's What You Leave Behind
8. A Mentalist's Primary Product Is His Name And Personality. The Effects Should Merely Serve To Reinforce His Image And Reputation.
9. Reputations Are Not Made By What You Do. They Are Made By What People BELIEVE You Can Do.
10. If Your Initial Claims Are Plausible, Your Later Claims Will Be Far Easier To Accept.
11. Art Requires Attention To Detail
12. What's Simple Isn't Always Good, But What's Good Is Almost Always Simple.
13. If Charismatic You Would Be Act Enthusiastically
14. The More Complex A Routine, The Less "Psychic" It Looks. That's The Difference Between Mentalism And "Mental Magic.".
15. If Someone Else You Try To Be, You're Condemned To Mediocrity.
16. The Best Way To Avoid Detection Is To Practice Effective Misdirection.
17. The Performer Who Is Wise Knows How To Improvise -
...And All That Jazz.
18. Out Of Mistakes, Miracles Are Born.
19. Anticipate The Inevitable…
…Murphy Was Right.
20." Trust No One"
Though presented with a sense of humor I'm confident you will likewise get the point(s) being made here and even catch a glimpse as to where some of my thinking comes from
For more information on this check out DVD entitled
BOB CASSIDY'S MENTALISM I can assure you that it will be one of the best investments you've ever made in this arena.