1678 is doing a test run of a full-size 3D-printed wheel; you can see it at
http://www.twitch.tv/frc1678. We're using the MakerBot Replicator 2 we got through Donors Choose.
We tried this last night, but the filament snapped, and somehow part of it had gotten wrapped around the drive gear. In addition, more filament was clogged up in the nozzle head. Took me about 2 hours to fix. I hope this one goes better.