Great post, and thanks for taking the initiative. I railfan the area often, and think there's a lot you could do to upgrade the Tehachapi route. There's been the elimination of signals (signal bridge just north of Mojave, for example), double-tracking in the Marcel/Walong area, a more accurate depiction of certain areas (add/upgrade homes along Marcel/Woodford; eliminate the house at the Allard curve, etc.), the upgrading of structures in the town of Tehachapi, total signal upgrade to UP's current type (Darth Vader style). Hope you continue with your projects. Thanks and good luck!