I have a saw mill and I've been using my few month's old cedar and poplar left over stickers to get my cat going, fast. Both cedar and poplar burn fast and hot...I was surprised how hot. A small pile can get the cat up to temp in about 5 mins. I add some fat wood when it's just about there, close the door almost all the way and it's well in to the zone before I cut it to a smolder and let the cat do it's job. I find this is fast and keeps the cat going for a long time with a very hot temp and bright, glowing cat. While this seems to work great, is getting the cat this hot a fast a bad thing and is it potentially doing any damage? Performance wise it's fantastic and my cat seems to burn for much longer when it get it really hot before engaging it.