Tonight I loaded her up with 2 large pine and 1 medium maple. After 30-40 min she's cruising at 650 with a good light show. The mag thermo on the single wall reads 300. I spoke with the fine guys at the factory earlier this year about temps and they said 550 is the sweet spot but 600+ is ok. He also says when you get the whispy flames the stove is burnin great and efficient. My question is my stoves get these great burns at higher temps 600+. Now 650 really doesn't get me too concerned but it is higher than the factory thought for cruising temps. Does anyone see a problem with my stove operation? The air is just about closed all the way maybe an 1/8 in of travel left.