[JesseK]

For the last two drawings (linkage drives), I believe there is a more practical way to link them when considering an FRC drive train. In order to keep the wheel base at its maximum, regardless of which way the wheel modules are oriented, the motor must always stay on the inside and the wheel on the outside perimeter of the bot. The easiest way to achieve this is to link diagonal wheel modules together rather than the modules on a side.

Great drawings though!