I spy a Colson wheel in the background, so I'm assuming it's a 4wd w/ colsons.
Looks very nice and clean. I too am wondering about that massive bazooka tube for an arm. As it sits right now, it can't reach the floor, so I'm guessing that it either telescopes or has a wrist that's yet to be added.
I guess your electrical guys are pretty quick. They need their cables fed at 400rpm!
BEN