we've posted it here in this thread, but the benefits we saw during our testing were improved punch, improved run time, lower temps. As far as install, just solder it right to the terminals for the ESC (battery posts). Match black to black and red to red. Don't change the length of the wires as it will change the effectiveness of the cap.

Correct the 12.8 is not a ROAR legal rotor. Also correct that our 17.5's come with 12.5mm rotors. I did try the 12.8mm in mine for 2wd buggy but I felt it was the wrong choice for the track I was on.

Just to give you an idea of how much torque the 12.8 produces, at Motorama I ran it in practice to get some hard data on it since no one really had any yet. I was doing 6-10 min runs with my B4.2. I had the timing set at 50deg on the motor and was geared 40 / 69. Yes I did say 40. Motor temp after 6 min of racing was 101 degrees. after 10 min it was 110. I would have gone higher but I didn't have any other pinions

When I swapped back to the std rotor, I was at 36/69 and was temping at 135-140. So that 12.8mm rotor should be a beast in a truck or touring car.

My next item on the check list is going to be to use the 12.3 and 12.0 rotors in 2wd buggy and gather some hard data on them too. Look for that later in the fall when we get indoors.