[jman4747]

The gearboxes and plates are interchangeable between sides by flipping them about one of their axis's I just chose the put the same assembly in. I didn't feel like mirroring it that day so yes it could be arranged in either manner.

The wheels each have a versa hub on the inside and one or two 30t vex pro pulleys on the inner two and outer four wheels respectively. The pulley size was more to get the wheel spacing I wanted in terms of belt spacing.

Originally my idea with was to make something with more ground clearance for use outdoors however, at some point I realized this setup had some constraints which wouldn't allow how much I wanted so I just said whatever and stuck with the 6". Figured I'd see where it brought me and do another one later. As it is 4" wheels could be added in.