The stove shot up to just over 600 the other day from a cold start. It's the hottest I've had it and it was a little neat to get that new stove smell from it again (although we've been using it since late last spring). It got me thinking about overfiring the stove. I can't imagine that 600 in the rear corner is overfire, but the manual says nothing about it. Only to burn between 400 and 600. Any ideas?