You got that bad boy crankingI don't have a probe in the pipe and I have double wall pipe. However, the temps aren't showing much higher than normal. The surface temp near the pipe outlet is running as high as 600 which I'm sure means the pipe temp is up too.
I am getting more heat from the stove by increasing air enough that there are lots of flames in the firebox - the sides of the stove are running close to 500* as well and that is a lot of heat into the room. I have no doubt this is less efficient than a lower burn, but I'm impressed by how well I can do these higher burns. I think I could go a little higher as I'm nowhere near 1/2 mark on the air (which the manual calls a high burn), but given the draft that may not mean a whole lot in terms of highest burn.
Current load I let burn hot (keeping 500+ on surface temp with full fire in the box). I loaded a bit after 7 and it is now 4.5hrs. I have now opened up the air more fully and have about 20% of the box with hot coals. Surface reading 400, side away from fan 470, 420 on the side with with fan blowing on it. Getting good heat still but I expect to reload in an hour.
So it is possible for me. Keep in mind though that I'm probably only really loading about 60-70% of the firebox as my wood is 16" vs the 22" that is possible to fit in. I don't have any wood of that size ready to burn.