Thanks so much for that suggestion. I did find some of that mesh, but I'm not sure if a steel plate would be better for this application. Perhaps it has nothing to do with heat transfer anyway, just something to keep the blanket protected. I just would like to know if anyone else used a steel plate and how it worked out for them. Maybe I wouldn't need anything at all between the ceramic blanket and the cast iron top, but that mesh was there for some reason.
Thanks
Steve