Hey, I just finished making the Stir Plate as described in the Zymurgy mag.
I did some prep work, but after I assembled all the items it took a grand total of 10 minutes to finish.
Pic 1: Low speed (yes, that is a drill bit on the test flight...my flea hasn't arrived yet!)
Pic 2: High speed vortex
Pics 3 & 4: Innards...