The presentation looks good, but instead of showing your skills as the core, why not get other people to demonstrate how it works.
I wrote about this a little in this post reply to someone else holding a seminar:
People are a lot more likely to be amazed and implement the techniques if you have them do it then if you play wizard.
In fact, I’ve taught memory techniques dozens of times in live settings and never give a demonstration longer than reciting the alphabet backwards or perhaps reciting a quick poem.
Why?
Because it doesn’t really impress anyone that much. Besides, I could have done it all by rote.
The real magic happens when I’ve got non-believers reciting the alphabet backwards in less than 15 minutes. Usually there are one or two people who resist through negativity or they just need more time to understand, but 90% are always able to do it. That’s real magic and that persuades people to master their memory more than any demonstration from me.
I should add that I’ve also done this by having people memorize 13 cards (a fourth of the deck). However, I’ve found this not nearly as effective as the alphabet. Not everyone is familiar with cards and there are actually better ways to memorize cards that require a bit longer to teach.
I hope this helps and that you’ll let us know how you do!