i tried my hand at this and was surprisingly having more success at the piccadilly (from terminal 1,2,3 and terminal 5 to cockfosters) than the line i actually lived on. damn that was a great little area of the tube, kensington olympia. but my complete inability to sketch the ends of the DL, i think, is because of all the damn starts and stops. would i start at ealing broadway, richmond, wimbledon? what about the edgware road branch? why are these all on the same line?