Fantastic news. What an effort.
Phil, you don't always get responses from companies regarding their infrastructure. If you have been waiting more than a few weeks, then it's likely that you're not going to get a response, let alone one with details. Have you got photos of the route, and some basic info on signals given to you by the diagrams/pictures you've used to design the route? If so, that's probably all you need. No MSTS route is perfect. If you stay so focused on getting every detail correct, then you'll probably never end up getting a route finished and released.
Regarding the signals, it's not always easy to find guides relating to signal positions let alone getting them from the operator of the line you're attempting to model. Google Earth can tell you where some signals are, and the shadows might help a bit as well.
BTW Expost, pressing ctrl and z together can undo the last action you did on your computer. If I'm typing a long post or email, I often back it up in a text document on my computer