Hi Gang! First a little back ground.My Brother in law has been in N Scale for about three years and now he wants to build a new but,smaller layout. So,my brother in law and I was looking over some layouts and I casually mention this one since I think its a good small HO layout that can be easily built in N..He agreed thats close to what he had in mind. . http://www.gatewaynmra.org/layouts/gcrr2.jpg My thoughts is a 36"x72" hollow core door..He doesn't think it would fit since he wants at least 22" radius curves made from flex track. So,I need your thoughts on this layout design for N Scale..If I was building I would use the door. All thoughts and opinions welcome.