Well after we kept running into issues we decided to take a whole new approach. As much as we love the tank tread, we decided to go with something even more epic. We went with Andymark Mecanum wheels along with Andymark motors for them. This gave us tons of more freedom in driving and the ability to move in any direction we wanted. This became very important for us when we wanted to be able to "catch" the quad when landing. 

We also then rebuilt the controller...

I bent the plexiglass with a heat gun.