Nice, man. That's got to be a chore dealing with that in the middle of winter. How do you break it down with the fire going? Doesn't the tent get filled with smoke? Wrapping the stack with chimney liner insulation top to bottom might help keep the stack temps up and condensation down, but that stuff might not be totally weatherproof without attention beyond normal installation procedures, (it's really meant to be around a liner that is going inside an existing chimney and capped, so out of the elements), and it will make your set-up heavier. Or you could try double-wall stainless flexi-liner, which will be heavier on its own, but will more or less clean itself with a cool-down cycle so that the coiled construction can contract, and then when you heat it up again, it expands and you can hear any build-up tinkling down. Of course you still want to check it regularly, and you have no fire during the cool-down cycle.
You using stainless or galvi? I'd be a little bit concerned about hot galvi fumes in the tent.
Not ragging on your setup at all, mostly glad that you are cleaning it out regularly, and maybe concerned about galvi fumes.
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