Cool. Seems like a reasonable price for amount of product. How much heat transfer to the room is lost in operation with the kaowool or does it just take a little longer to start throwing the same heat. Gotcha. I referenced the model 13 a home depot for a few ideas, but I was hesitant to crawl on the floor of the store with a mirror and flashlight to check the secondary air hole size. I believe the're behind the legs on the bottom of the stove. Oh, ok. Yeah sure looks welded in the photos. Screws are waaaaay easier in that tight location. Food for thought. That cuts the time for that upgrade way down. Where did you make your three holes. They look like they're on the front. How'd you route that?