Things I like: she is pretty
Things that could use improvement/addition:
-Gearbox and chain run mounts should always be added to your CAD, they are pretty much the most important thing in a drive train besides the frame.
-Twisting forces are going to be rough on the two drive pods. Due to their cantilevered nature.
-1/4" plate is way to thick for this application, I think you will lose a lot of weight with less material and some well placed spacers.
As a side note, why CAD 40 drive trains and spend 60+ hours when you could just do a napkin sketch? (I do admit CAD is fun, but it isn't really a necessary part of engineering design)