[Ninja_Bait]

The follower wheels are nice, but you could probably have mounted it upside-down so there's a little less metal under the belly and give yourself a little more clearance.

I always think that if you're going to build a robot in CAD you should at least figure out the correct center distance for a chain run, so I'm not a huge fan of tensioners. Just remember that the sliding one will probably slide, and often inopportunely.

Those are my only qualms, and it's really just an opinion thing anyway. Otherwise, it looks pretty solid and well thought-out. Very nicely done!