We have the same exact stove (Glacier Bay). I believe we were chatting a bit here last year re: my setup etc.
This season I decided to install a baro damper, the 8 inch Fields Control RC. Wow, what a differece it has made. My burn times have gone from 10 hours to upwards of 14. Also the house is a comfortable 68-70 degrees instead of 80+. My stove overfired waaay too much before, and closing the MPD set off the C02 detector in the basement a few times on warmer nights, which scared me off ever closing it down. No c02 alarams at all with the baro.
I have the baro adjustement weight set at the # "4" position and it seems to be perfect now. My burns are predictable and consistent regardless of wind & outdoor temperature. I keep the ash door knob damper open about the thickness of 3 credit cards, which seems to keep the burn perfect for these temps (low 30s at night here). On bitter cold nights (20s or lower) I will probably have to turn the ash door knob damper a bit further open to get hotter fires.
But overall the control and consistency of the baro has been GREAT. Wish I'd done this project sooner. So far I am projecting a saving of 1/2 to 3/4 ton of coal per season. For my super-tall chimney which could suck a small child upwards with NO fire going, a baro was really a necessity. Count me in the pro-baro crowd 100%.