Hi Luke,
I thought I'd share some thoughts on the sabertooth 2 x 12 Motor Controller since I now have the tank working well.
So the tank I have the TCB installed in is a Taigen Panther which I purchased in kit form, with 4:1 gearboxes, 390 motors, etc. The wheels are ball bearing with no rubber on the circumference. The gearboxes have bushings, except on the output shafts have ball bearings. Idler is ball bearing also. The tracks are really smooth in running, no stiffness in the pins.
When I first put the tank together I had a IBU2U installed, but the tank would not turn well, especially on carpet. To do a sharp turn I would have to stop completely so static friction would take effect and help it turn. Not good if you are trying to battle, or just drive it around. Since I was having other issues with the IBU2U, and since I got a new 2x12 controller for Xmas, I decided to swap out to the TCB. After rearranging the internals of the tank to fit the 2x12 three times, I finally got it all to fit inside the tank without the slipring trying to pull the smoker plug off the TCB when I rotated the turret. Don't get me wrong, the Panther does have a lot of room inside, but the sabertooth 2x12 has large heat sinks to deal with which made things awkward. I even put a shield between the TCB and the underside of the turret so it could no longer catch up on any wiring, etc.
Upon driving the tank, it was really transformed. No more motor whine. It will crawl much slower even than the IBU2U/IBU2. And it now turns.
I think the turning is due to the regenerative braking that the sabertooth has, since if traveling at full speed the nose will actually dive a little when stopping, and it stops fairly quickly whereas with the IBU2 it would kind of coast (built in inertia).
Just thought I'd share some impressions on the controller hooked to the TCB. Thanks again for all those involved with the TCB, it is really awesome.
Jerry