Building O gage layout. Using Atlas switches. The arms of the switch are suppose to snap back when pulled form one side and released. My switches (Atlas #5) all have Atlas switch machines which will be powered and run through Lionel SC2 switch controllers to Legacy Cab2.
I believe at one time there was some type of electronic derailing feature that could assist in snapping the switch back after the train passed over it. Is this device necessary to make switches work correctly and if so why did Atlas stop selling them.
Obviously I know very little about this. Thanks for your help!