Welcome John and the rest of the gang! We are so glad you are here! (and in Mike's case that you are there!)
That big top is in the same league as the ones Alan and Eric make! The tradition here is to give them a name. "Newton" sounds good. "Coriolis"? "Schrödinger's Cat"? (probably not)
The smaller one even has the Figaro stripes!
So, the handle is on the crown? Could you post a picture, perhaps?
I feel very flattered that you may use the spintop induction motor in your demonstrations. I think it is a pretty neat demo. If you have the magnet and the tops it can be assembled in seconds (and disassembled to get back to playing with the tops
).