If you are trying to become a demonstrator, I would suggest that, after you show how obviously talented you are, show how easy it is to operate and sound good on the 3000.
Do some simple things, one or two note melodies that people recognize. And it would help to explain to the audience what you are doing.
You are such a good player that it might intimidate people into thinking they have to be that good to enjoy an arranger!
And yes, smile!
DonM