Hi Peppermint, thanks for the follow up. I am a new AFOL and am surprised and almost overwhelmed at the sheer scale of info (websites, forums) related to this Lego. But there is no definitive guide! Probably because, I am beginning to realize, it is mostly about MOC's. I am mainly into City Trains and my next job will be to motorize the points/switches. This is a good example because a google search returns links to various forums and websites with various methods. You pick which one looks best!
I'll keep looking and learning. Thanks all.