Man am I stupid. I needed this controller like I need a hole in my head. It's too much amps for the Geo, and I'm using the Open ReVolt in the Toyota:
curtis controller model 1221: eBay Motors (item 320540030905 end time May-31-10 13:29:46 PDT)
I can put it up on my shelf next to the 1209B that's been sitting there for months