Greetings. A little about me (very little); I'm somewhat new to the hobby, that is to say I'm new to actually building a layout, however, I've dreamt about it for years. I'm building an HO layout. The dimensions are approx. 43' x 8". No thats not a typo. The layout sits about 7' of the ground and goes all the way around an 11' x 10 1/2' room and is 8" wide. I have loads of questions for you experts out there, but I'll just start with one at a time. Ok, question #1: Derailments are obviously going to be a major concern, so what are the most important things to do to avoid this as I am laying my track (most likely going to be atlas code 83). Please feel free in commenting. All advice is appreciated. Thank you.