Ditto the good luck wishes Duper!

I also wanted to note that some say the mercury under crowns leaches faster (and here I was hoping I had sealed it in) because of the metal base of most crowns causing a galvanic response with the amalgam it's sitting on. My fear in going for replacement is that I'll lose many of those teeth because the amalgams were so big, there won't be enough tooth to build the ceramic on.