Wiggy, where do I start, it's a magnificent, amazing, wonderful, terrific, great model railway layout, I have watched with no small amount of envy at your work. You have built a frame for your layout, you have layed the tracks on your layout, & fixed the track down, you have signals operating on your layout,you have wired the layout, you now have your trains running on your layout, and cleaned the pond filter, and the garden, you even have time to video your layout for us mere mortals to oggle at, you even have time to answer our questions, is there no end to your masterful skills. Now here is my question, what happens if you get a derailment in one of those tunnels, DO YOU HAVE A MASTERPLAN, JUST IN CASE