Wow that a heck of a long track run on several levels no less. I take it that your layout is a "point to point" layout rather than a traditional "around the room" configuration. Nonetheless that's one amazing layout you built and the carpentry is just over the top. I'd hate to have to guess how many hours you have in that wood work.
BTW, enjoyed the video and my wife loved it as well. Keep up the good work.