Greetings from Beautiful Boise...and apologies in advance for the ignorance... When I was a child my family visited a restaurant (I believe it was in the Los Angeles area) that had a large train set running through it. I believe the train actually delivered certain drinks and condiments, so it was probably of a pretty fair scale. I have decided to do something similar in my home (with the tentative blessing of my wife, and with enthusiastic support from my children), except without the food delivery capability. In order to build the system, though, I will need to run track (3 rail O) along walls and suspend it from the ceiling. However, the ceiling height on the first floor of my home ranges from a minimum of 10' to a maximum of 24'. I will assume that O systems will not tolerate much vertical change...is this true? For example, I can see where an 8:1 or steeper grade might be a problem... Second question: Does any company make either wall-mount brackets or ceiling suspension (perhaps in adjustable lengths) accessories for O track? Third question: If one runs some 250' of 3 rail O track, what might be a good choice of transformers/power controls for a single train with a single locomotive pulling perhaps 12 cars? I know nothing of this volts/watts disgronification business... The train itself is all post-war Lionel... Input greatly appreciated!