An .stl of my double head signal is on another thread.
Alan, I had a look at your posted .stl file in chitubox; really nice, amazingly realistic. Only question, is there supposed to be a second signal head, or did I miss it? I see only one signal head that looks like the lower of the two, since it has the mitered support post. I would like to try a test print of the file and see what success I have, though ladders and railings are often problematic.