WCD style Drivetrain for 6wd
 

I'm curious what sort of drivetrain other teams are using.
We are opting for a 6wd with 8 inch wheels. We're considering a couple reduction option but favor a 12.75: 1. None of the WCP vexpro gearboxes give us what we need so we are considering a Toughbox or toughbox mini.
http://www.andymark.com/ToughBox-p/am-toughbox.htm

What is your team using and why?