I'm looking at the woodstock Keystone this time. I really am limited to doug fir, alder, birch and big leaf maple. Softwoods. Anyone have experience long term with soft woods and cats? Is it going to plug up the cat early? Are the burn times going to be so much shorter that I should look at a larger stove? My wife has vetoed the fireview and the harthsones. (she is a tough critic) If the keystone won't work, then I am probably looking at a Jotul.