Now starting to lay out the area for the hidden trackage area and tunnels. Trying to keep things in order to avoid running into complications on this small layout build of 30 "W by 52" L. The hidden trackage area has 9.75 Rad. and will be all flex track on cork roadbed mounted on the foam. When this little module/mini layout gets folded into a much larger layout the track inside this area will be removed because the access to the area will be gone and the line abandoned. While this serves as a small layout for awhile, encouraged by the Wife to keep me out of trouble, before being eventually folded into the larger one I need access to the hidden track area. Decided on a 6 inch height after measuring my hands for access to reach in for any reason, and to later make removing that track to reuse elsewhere much easier. Once I get the walls up, today I hope, then I will lay the roadbed and track before covering with the top deck. The back will be faced with Masonite with cut outs and just enough lip to prevent a dive. For the Masonite I have decided to buy some precut at 2 foot height just to avoid the hassle of dealing with a 4 by 8 foot sheet. Using some 9.75 Rad. sectional track to establish clearances. Looks like I am going to have to have some wider tunnel portals for my mice eradication and dust bunny clearance system. The south end of the Big Guy checking out the tunnel location.