I think this should be close to the final layout. Thanks to all of the helpful suggestions on The-Gauge I think I have avoided most major mistakes but would like to get further comments to help avoid at least some of the minor ones. 50 years ago my wife took a trip (alone at nine years old - can you imagine that today?) from Minneapolis to LA on the GN so she wants a GN passenger train (8 or 9 - 85' cars) running on the main line. Hard to do much switching with that so I want to have hidden reversing loops so the train goes out in two places and comes back on the same track to at least avoid a "round & round" running appearance. Overall track is 8' x 20' - front & side edge will follow track contour. DCC control (Digitrax Empire Builder ?) Gray line is a room divider to hide reversing loop. Opening in wall will handle entire layout. Room wall does have a 45 degree hard wall (30" x 30 in upper lefthand corner) Lots of space to front (bottom of drawing) and right side. "Lake opening is 30" x 20". Adjustable height (42" > 66") Caster mounted to move out from wall and pull through room divider when needed. Reversing loops 24" radius - main line 30" min, most of track 24" min, Absolute minimum 22" All main line turnouts long Peco - all others medium Peco. Plan to add more switching yards later. 2" extruded foam base. 4" clearance on stacked loops - cookie cutter construction. Sensors on reversing loops to automaticaly switch polarity and turnouts. Switch motor controlled turnouts in most locations. Main line passing tracks and station area (on the right) to be level. Maximum grade approx 2 percent. Questions: If I use 2" extruded foam do I need a plywood / chipboard base or can I just use an open frame 12" or 16" on center? Should I bury electromagnets in a bunch of locations? Best switch motors? Other hints & tips? ...Jim Anybody is more than welcome to use part or all of my layout design. Please send me any improvements you might consider. It was done using the free XTrkCAD program. If anyone wants a copy of the layout file e-mail me and I will send the *.xtc file.