Reply to "Success an easy modified set up so trains automatically slowly start and slowly stop in an automated museum layout? Running reliably now."

Years ago, a friend put a standard 120 volt light bulb in series with the track, switched into the circuit when he wanted to stop the train. (I seem to recall a 40 Watt, but time has erased the exact memory, and the wattage will vary with other factors, including the size of the motor, the size of the train, etc.)  The effect is to slow the train and finally stop it gently. It can't hurt to try that simple solution.