We used 6wd with a setup that mimicked the rocker bogie system on the Mars rovers, and could lock into a normal dropped center 6wd configuration. Vexpro ball shifters and 15mm wide belts, with 36 tooth pulleys, WCD setup with Versablocks.
Once the system was setup correctly and all of the belts tensioned properly, we had zero issues through Vegas and the championship. The drivetrain absorbed shock well and didn't have any issues going over defenses.
If we were to do it all over again, we might just do the standard 6wd pneumatic setup that lots of teams used. It would have saved lots of time during build season.
