when 2 locos are used when switching how easy is it to seperate them to switch individually ? is it simply a matter of uncoupling ? obviously there must be 2 crews which brings up another question. do the 2 crews communicate with radio or what other method is used ? i have just read about switching facing point spurs using 2 locos and not having to run around the train. this is what has prompted my question. it will be easy to do on the model but was wondering how it was [is] done in the real world.