Thanks for the info, I bought a used 1/10 scale system off a guy here on the for sale section and he said the system was perfect,, well after running the motor after 4 laps at my local track, the motor started to make grinding noises and I took it back to my pit and COULD'NT even put my finger on the motor,,it was that hot!!!!! I actually bought his whole SC10 truck with the system in it, truck is great but I think the motor was bad,, he had it geared at 87/23,,, is this a good combo or a bad combo for this motor????? By the way I called him as soon as I got home and his reply,"call castle creations",, nice guy!