arm and hammer

I just came across another W M Case Darlaston leg vise like this one. I’m around the Philadelphia area. This is the only other example I found on the Internet after looking up the makers mark. Not sure if you ever found more information about it but curious if you did.

The floor of the Chile forge I received doesn’t seem to have rigidizer on it, but the walls/ceiling of the forge do. Since the ceramic floor tile goes over the floor, covering the exposed wool, do I still need to rigidize that part? So far, everyone has told me I’m good to go but I don’t exactly understand why and want to be sure before I destroy my lungs.