Yeah, I forgot about the firebrick suggestion. I'll be doing something next year to stretch replacing the nozzle. Will post some pics and methods once I figure out how to remove the nozzle. I asked someone before and I think you have to remove the side blocks to get the nozzle out. I also see in the gaps something that looks like some type of woven, fiberglass rope. I'll figure it out when I get all the ceramics out. She's shut down for cleaning and storage plumbing. I wanna say, " Can't wait..", but yes I can. Glad Spring's here! Yep, gonna get some firebrick.