JAYHAWK500,
I see you have a rather large area for the layout but also many access points to the room. I don't know how many 60 or 72 inch curves you can use. Are you willing to give up some of the use of the access for a around the room layout? I would look at using the 48" for the most part and maybe have 60" or 72" in the corner of the room where there are blank walls. Remember that you will need access to the track in those areas also. Might consider a layout with walk around access. I needed to do that on my layout, had large area but also access difficulty's. You might want to try laying out track on the floor and get some ideas that way before building benchwork, just a thought.
Ray
