And it can be removed, allowing for installation of the bridge. Here's an earlier test fit of the new bridge, cut from Gatorboard. Gatorboard is a specialty structural foam product with an even surface and it is quite rigid, while being very light.
Many thanks are due to Tom Schmieder and Jim Harr, who both have helped me bring this vision to life. It was threading a needle in many ways and while there is a ways to go, we are getting there. The bridge will get Masonite girder sides and needs track laid and wiring completed. But in the meantime, we need to clean up in order to host an operating session for guests this coming weekend. Building a layout like this sometimes means having to build while accommodating operations - a lot like the prototype!