Just found and joined this forum. I am getting ready to build the Central Midland layout and I ran across a post from member "ekeefe" from March 2008 about some questions he had with same layout and revisions he made. I hope your still on the forum and see this! Couple of things, did you have to change the grid dimensions to accommodate substituting 22" for 18" radius and 24" for 22" radius curves? The other concern I have is do you run into any issues if you used under table switch machines? Particularly under the yard, wondering if there would be any issue with clearance for underneath track. I realize this layout was designed before these switch machines were around. Also any problems with the grid support being beneath a turnout? I really like your modifications and I intend to do same. Thanks for any help!!