Good morning.  For my son's birthday, we purchased an Alco FA-2 set in Lehigh Valley trim.  Great train.  In any event, I was wondering how I could, or if it were possible, to lock the train in neutral so that it could be parked on a powered siding when not in use.  I know that with the older Lionels there is a slide switch that you move when the train is in neutral, and then it is "parked."  I read the directions for the FA-2 and did not see such a feature described.  Is it possible to do this on this train?  Any help appreciated, thank you in advance.