[AdamHeard]

I can't really speak for the belting, but everything else is looking like a decent start.

Don't worry, both the pocketing and cantilevered wheels are features that have been done before by teams, so assuming you've done the math, it should hold up just fine. What kind of machines do you have available, as that can affect how you would optimize your pocketing to minimize production time.

I'm personally a big fan of the standard hole pattern on the top as well; works out to be extremely convenient/worthwhile in the long run.

The slots for fasteners for what appear to be bumper mounts also look rather small (1/4"?). I would increase the fastener size on these as I imagine it would work out better in the long run (I'm imagining the a smaller diameter fastener tearing the plywood and becoming loose much faster than a larger one).