Boy, this forum came along just in time. I've been scouring all the articles in every issue of MR (only a couple of years worth) and any source I could lay hands on and could never found a satisfactory answer. I've seen countless layouts that have a stub end like the one in the attached picture but have never figured out how to service the industry in the bottom left corner, especially if the train is traveliing clockwise. By the way, the layout is roughly taken from Model Railroad Planning 2004, X Factor Staging. The solid blue line is the mainline.