Thanks a bunch. I ripped out my thick-walled pipe and ran 4" pipe throughout... the stove's running a ton better, and I got rid of about 50 lbs of weight on board. I'm also playing with the indoor/outdoor pressure discrepancies, and that's helping.
Last question (maybe): does the stove pipe hat make much difference as far as draft goes? It seems that a good one would make a difference, but I've heard conflicting reports.
