Jason,

I will let you know if I find out more information or if anything I do leads to anything positive in anyway.

But I do ask you please please please get yourself a sample of both the crown material and bonding material. Make sure they are seperate and do a cheek to gum test for about 2-3 weeks before even considering using CEREC. I have a sample of CEREC though aluminium based and I reacted to it after about 4 hours in my mouth.