The blue motors came with the gearboxes, they are a higher speed than stock supposedly. I just ran it around the office and it is pretty fast, much faster than the plastic gearboxes that were in there, but the tracks are pretty stiff and not running smoothly. I think they need to be broken in to the sprockets, letting them run for a few minutes seemed to help but they are very jerky and don't mesh with the sprocket teeth very well.

I'm going to pull all the pads off again and see if running the tank breaks everything in to each other and then try the Liquid Nails on the pads.