I remember being out to John Coots (N Scale of Nevada) home layout in Reno, and he had a couple of those 3-track etched brass Ntrak signal bridges on his layout, lit up and functioning. Wow. gorgeous, if a little odd because of the wide size for 3-track Ntrak.
He opened up a closet and showed me a 'floor to ceiling' pile of them as kits, said it was an expensive mistake, used it as an object lesson to me at the time to 'mind your inventory'. So if those are surfacing, don't sit around thinking too long about it, they won't last forever.
If those weren't secured to the top of the layout and had loose mount/breakaway, they'd probably survive. Brass can take quite a whack, and you can straighten it back out and touch up paint.
I've had an NGI cantilever signal for years and made it removable, basically because it kept getting damaged and I had to repair it regularly. That was styrene. I just can't imagine how brittle a Shapeways FUD one would be as you can sneeze at that stuff and it breaks, but if the design could be made in the new resin stuff (with support legs during printing) it would probably work. Add your own brass ladders from GMM or somewhere else.