I loaded the stove 30 hours ago with odd pieces of Silver Maple, yes, Sliver Maple. It seems that it doesn't make a bit of difference what kind of wood I use, it does great. Has anyone else burned "inferior" wood in a BK with similar results? I think that once the stove is turned down enough that the cat is making the heat, it does just as well with soft stuff as it does with Oak. I think the last pic says it all!