OK - extrapolating from RobM's method on the TOM Tiger Saw, by horizontalizing its perpendicularity, I have succeeded in making a spinning roulette wheel on my Whodunnit?
To quote Doc Emmet Brown "Great Scott - it works - it works!"
I don't have video capability, so here's a list of parts followed by progress pics.
In this application the spinner motor is wired to the central standup target riser motor.
The whole deal cost me $6.50 for the roulette set at a local market.
* Computer fan motor as per Rob's thread.
* Roulette wheel 160mm overall dia.
* 3 @ 1" x #6 rnd hd machine screws
* 3 @ #6 nylocs.
* Some washers t/suit
* 3 @ spacers about 3/4" depending on motor. Made mine from rigid retic jet risers - perfect dia.