This product is great for active who owns a tt01. The plastic motor mounts would seem to warp and distort with excessive heat brought on by brushed motors. The mount acts as a Heatsink and allows for the dissipation of heat from the motor. It also fits snugly into the groove where the plastic mount works have play. This mount also conveniently displays on the mount the arrangement for the appropriate pinion. Making life very easy. Great for brushless users As they will not flex from the added power of the motor.