These are the parts for our drivetrain.
I have to give credit to team 687 (CAMS), specifically a mentor of theirs - Todd Mendehnall (sorry for any mispelling)- for a large part of design, and providing a CNC for fabrication. We loosey worked together on it as we are both sponsored by Northrop Grumman and some mentors are friends at work.
The wheels were designed by myself with some advice from mentors, and will not be used by 687.
If you look at our other recent teasers, you can probably tell exactly what our robot will look like.
6 wheel drive train, 2 cims driving on each side, is that a spot for a tensioner in the center of each plate? and plenty of clearance for driving up ramps, you gonna paint it? and then i guess those like about the right size to be the spacers between the plates
they look great i saw our set up with wheels and electrocal. lol. Mendenhall designed everything…
Well… The wheels are BCR’s and Mr. Sterk did provide a lot of input. (and to be be fair, I passed a lot of info off to Ken.)
but. Todd is awesome, It was great working with him.
you must show me this gearbox! 
i agree…i would like to see this assembled and a video of this 
lol