Greetings, Wondering if anyone has anecdotal or scientific input about heating efficiency at the coaling stage of a fire. Usually, I check for amount of coals at around 300deg and either break them and open up the air or just let coals diminish on their own until there's enough coals for a reload but not so many of them that I can't fit a good load and/or set myself up for a nuclear situation. So, my question has to do with how much heat am I allowing to go up the flue when I open up the air to hasten coal burn (and thus wasting heat?) vs how much heat I'm retaining by letting temps drop more slowly before a reload. I'm sure experiences and answers will vary depending on a bunch of factors, and preferences may come down to how soon you want a full blast of heat from the new load. Either way, it'd be neat to hear what folks have to say. Thank you!