Well, what you did looks quite nice, especially the details. However, I hope you are gonna change the textures. It looks a bit plain atm. Also, the floor is very simple. You could use some diffrent textures for it, making paths this way (like for example on nano) or place some boxes on it.
Is the railing the thing you mentioned in your post about rails. I think they could get quite close to the original by using a cylinder for the main railing and a square cylinder for the vertical parts.