not sure what the pitch roll damper would do, but I have the kyosho ball diff and the control is 100% better than the stock diff. dosn't spin out as much (can still if wanted though) And not sure about the DuraTrax Bearing 3x6mm I would recomend the MZR dry bearings and install them in the front wheels, one in the rear wheel spur side (outside) and the 2 in the motor mount where the diff goes through. This will also halp in smoothing things out, increasing run time and increasing speed.
not sure what the pitch roll damper would do, but I have the kyosho ball diff and the control is 100% better than the stock diff. dosn't spin out as much (can still if wanted though) And not sure about the DuraTrax Bearing 3x6mm I would recomend the MZR dry bearings and install them in the front wheels, one in the rear wheel spur side (outside) and the 2 in the motor mount where the diff goes through. This will also halp in smoothing things out, increasing run time and increasing speed.