[asid61]

It looks pretty good. I really like how you've made everything so simple, with a 2-piece shell. However, there are a few superficial features that I don't know that you need:
-The height of the module is excessive. More than 5-6 inches is too much. I see you have already elected to fix this.
-Where is the bevel gear and sprocket coming from? If it's the vex one, how are you making a 3/8" hex bore sprocket?
-Those gear teeth up top look cool, but you may not be able to make them even with a 4th axis CNC. Gear tooth cutters often have a very large radius, so it could be difficult to cut small gear teeth there.
-You need a second bearing up top. Don't believe me? Stick a shaft through a single hex bearing and see how much it wobbles.
-Consider the new Vex colson wheels; go for something on the order of 2-3" diameter wheels, as the structure of a swerve drive can sometimes allow it to ride over bumps using the abnormally protruding wheels.
-The mounting for the bearing plates near the top look a little unstable, as they are supported on only one side with thin walls. This would be a lot easier if you scrapped the whole tube-shape design.

As a side note, put all your encoders in CAD. It will make life so much easier. Also put motors, mounting, etc. into the CAD.