I read somewhere that if you want to just burn wood in a wood/ coal furnace you just cover the grates with firebrick to burn better. Anyone try this? I have a hotblast 1537 on order and don't mind experimenting. And i realize that you would have to pretty much shovel out all the ashes. I have about 3 tons of coal but. Was wanting to see just how good of a woodburner you could make it. Any ideas or thoughts? Wonder how good it would work?