I've got a Townie with the GEBE system. I'll get some pics when my new tires to show up. But here is a pic of it before I motorized it. Picked up the bike for $25 used. I painted it, new BB bearings, new chain, and new wheels. Couldn't beat that deal.
Here is my bike with the GEBE attached and with my new tires. Sorry about the bad pics, they were taken with my cellphone. I'll get better pics tomorrow.