Naaaah......just think of the satisfaction you'll have when you look at that dirty brick in your stove three months from now and say "I modified that to fit in there....".
I only mentioned that option if you already HAD the grinder. I've used that grinder for countless different projects, so I already had it (and the blades) available. Not to mention, buying a whole stove of brick for my Napoleon is a tad expensive, so I cut my own for a fraction of the price.
