Guys,I am helping a very good friend design a N Scale layout on a 36" x72" hollow core door and as of now we are stumped and need help. The wants. 1.A small 3-4 track yard. 2.A Small town area with 2-3 industries. 3.A power plant /mine loads in/empties out. The first two is the easy part #3 is where we are stumped. The givens.He would like not to have any steep grades and prefers to have no grades. My thoughts is to have a Mountain on one end with the mine at one end and the power plant at the other with the main line passing behind the mountain while 2 hidden tracks connect the power plant and mine. Any suggestions,ideas or plans is quite welcome.