i have just bought a second hand M-tronics Sprint Sonik 3. have been told that there is only one problem. for some reason it doesn't spin his motor very fast. It does power up, do the beeping, the led's all come up nicely, steering works, and it does put power to the motor, but it doesn't spin as fast as he thinks it should. will post for info when i receive it. anyone know ahts wrong if anything? also does anyone know where i can download a manual from?