Mike Strap Hanger Mark, thanks for the comments - all the elevation changes were brought about by my wanting an over and under trackplan with the ability to have a train use both "loops". The Ross crossover saved a lot of space I needed to get the elevation change without needing to go over 2.8% grade. Plus the 9x13 forced some creative thinking on how to get it all to work together. That said after construction I realized there was more I could add. Additional passing tracks, lower yard, third loop - all interconnected.
Most of these changes are on the TPRR topic. Mike you can also see how I ended up doing the deck over. The deck over the "yard" is held in place by 4 screws and is "easily" removed if I need to work on the yard track. The supports are 1/2 plywood with Kreig pocket screws set into the underlying plywood. The deck itself is 1/2 plywood so relatively light. Later on I added 1/2 wood blocks to the to of the supports to add a better look and to have good fastening points.
I was looking at a cab video I took of the layout Sept 2019. Lots of changes and way more finishing work completed. On the agenda is to take a cab perspective video tour starting in the terminal and winding around the layout.
Jeff