Looks very nice! Would you be willing to share the cad?
What are you doing for the bevel gear attached to the wheel? It looks like it’s dead-axle with the wheel, but I don’t see how they’re attached to each other.
Could be turned down and pressed on?
Ding ding ding, this one’s a winner, folks! (Except the wheel is bored out instead)
I’ll be releasing the CAD files sometime this weekend.
Makes sense, it’s easier to cut plastic than steel 
Is a slot on top of the big steering gear necessary to prevent rubbing against a bearing of this nature?
I’m not really sure what you mean by “slot” - if you’re talking about the bottom face of the turning gear scraping against the plate, there’s actually a 1/16" gap designed into the turning gear such that it doesn’t rub against the plate.
I was actually thinking of a different swerve, whoops, but that actually answers my question, thanks.