prismspecs:
Thanks for the tips. I guess a big question I have that I didn't explicitly ask is: how do you attach things to the motor shaft (or whatever the rod sticking out of it is called)?? It is totally smooth so it doesn't make sense to me how one would connect something. [...] Do I remove the shaft that is already there and replace it or is there an adapter?
The drawing at the ebay link shows the shaft diameter is "0.8"
I guess it's the French system (mm)
Most couplers (hubs, bushings) I've seen are for 2mm, 3mm, 4mm