Someone brought one of these into the shop to consign. I had no idea what it was so I invoked the-all mighty "GOOGLE" and found this thread. Luckily it has "TWIN LIZZIE" in big letters down each side so I could google appropriately. Whoever built this one seems to have done a really nice job. May keep it for myself! I'll need to inspect it closer to determine what the motors are.
Just posting this link to share the find. Not pimping it to sell here in this thread.
http://boise.craigslist.org/tag/2673485225.html