I apologize, my post was not meant as a reply to your post, just a coincidence of timing.
But anyways Corey, I'd not be too worried about any hopper fire with your high volatile bit coal...with that sealing flapper falling open after a burner cycle there is no chance of hopper fire...the idle fire air crosses over the top, NOT up from the ash pan, of the sleeping fire...his coal @twentyacrefarms has some good volatiles too.