Gandy, does household cement have any other names? It might be a local term, or maybe I've just never heard of it. I did the hair dryer trick on the couplers, but will have to do it again. I had an idea to put a brass angle strip inside the floor to flatten it, but will try the hair drier first.
Major, I have a few broken/missing steps also and it looks like they had been previously attached with Goo. They are missing now, so I may have to build a few.
Thanks gentlemen!