I have 2 early FP45 diesels made by Williams. The " E Units" are electronic and some of the first produced by Williams.
The unit only has the sequence "Forward-neutral-reverse-neutral-foward..." They do not cycle into automatic forward after 7 second when the power is off . Is there any way to "lock"  the unit to work in only one direction- for example, forward" ? Can an external switch be added to enable/disable the "lock" post? I would like to be able to have the "e-unit" work like the older Lionel e-units with drums.