I'm a newbie to O gauge after years of HO. I've attached a SCARM file showing the space I have available. I want to have two main lines with a trolley line centered around a town (my wife's request). I'd like to have a small yard and the ability to switch trains from one line to the other. As you can see from the the SCARM file I have walls on three sides, so I would like to either walk into the layout or be able to access from along the walls (or both). I'm planning on using Scaletrax, but that isn't available on SCARM, I've been playing with Atlas in basic designs, but my lack of creativity/immagination is killing me. Any help/suggestions would be greatly appreciated.