After a bit of research, I've found that the particular model I have was made in 2002. Evidently, BM changed the size of the burner substantially in or around the 2010 model year. The burner size dropping from 21" to 17". BM claims it's the same BTU output and doesn't effect the grills performance but many owners disagree. While the BTU output was equal, the heat distribution was more centered in the firebox and less so to the perimeter. Music City Metals sells the 21" burner. for pre 2010 models so I bought one to have as a spare. Went with BM ceramic Briquettes. I'm painting it semi gloss black. Have a bid in for stainless side shelves too. The stainless folding shelves are outrageously priced unless anyone here knows a source for more inexpensive ones...used of course.