I have had a N scale layout for a long time. I have all of my track layed and almost all of my scenrey in place, except for buildings, I was wondering about block signals. What brand of signal, detetection unit, and anything else I need to automate the block signals you could recommend to me. I do have a reversing loop that I would like to incorporate into the block signals if possible. I will probably later on add photos of my layout so that you can check out the size and other aspects that you may need help with.