Screamin Serpent help

I've made a TA2K with my screamin serpent set and the train keeps going around and back up part of the tower after it completes the circuit. Does anyone know how to make brakes for the screamin serpent? Any help would be greatly appreciated.

Like RCMuzikGuy says, just stop it w/ your finger. Brakes on SS kits has been talked about before.

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