Hello, I rehabbed a 3500 stove about 4 years ago, never been super impressed with its performance. Maybe it is in my operation? I will say it is nice to have it as a secondary heat source to the Woodstock. Setup and Changes: I installed it with a 45 elbow /T/ and a short section out the wall. No issues with negative air pressure that I am aware of. New gaskets and new higher output draft motor. The stove came with a clinker-less pot bio fuel pot. The bushings, burn pot and motor are shot for the stir pot. Operation: Running Spearfish premium pellets. 1/4" pullout on the draft rod. I seem to get better heat output when leaving the pot 1/2- 3/4 full of ash and coals. Anyone else observe this? Anyone have any tips or observations with this pellet stove/pellet pot? I think mine is the older version with the spaces on the top of the frame. I have never ran the stirrer and am almost tempted to fix it and give it a try, but a new pot/ motor and bushings seems high cost for an experiment. Thanks in advance!