Hi Ken,
It looks like I neglected to answer your question. The bridges are still an ongoing project for me. Building just one of them is a challenge. There is quite a lot involved in the design, machining and etching off all of the parts. This will be a long term project for me as I tend to jump around between various projects. Right now I'm trying to finish up my trackwork and design a wireless DCC throttle. But enough talk about models since this is a proto forum.
I have to confess that I have been spending too much time drawing maps lately. I have been having a lot of fun doing that and it is probably more suitable content for this forum.
Thanks for visiting the site and I'm glad that you found some useful material there.