I'll repeat the word WOW! Your project is ambitious and is looking VERY attractive and impressive. From your pictures, when finished it will approach or actually define the term, "work of art."
I'm guessing this is in your basement. In any case, when finished, are you making it so that it can be moved out and reassembled in sections for public viewing? And if you don't mind me asking, are you planning on puting it in your Will donating it to a museum? I was thinking it will be a combination of very beautiful viewing plus educational and historical - steel (along with railroads) was a major "player" in building this country. Also, we have lost most of our big industries and from my viewpoint they are not coming back.
DougC