I'm surprised the WM stove doesn't work as good as the Kenmore. (I'm assuming that's the stove you had in there) I would have expected performance to be close to equal between these stoves with the WM performing a little better. Maybe the Kenmore draft control is the key and is more air-tight than the WM..?
Do you just like the looks of the WM better...?why not use the Kenmore instead? Parts might be an issue for the Kenmore though.
I have a manometer about 2 feet away from the single wall stove pipe on the circulator stove in the library right now. Lots of info about it here.manometer install
As far as the .02 draft, that is too low in my opinion. I prefer about .04 to .05 for these types of stoves to insure adequate draft though the entire burn cycle. When they gave that recommendation, I bet they were giving a "best guess"for setting the damper without verifying it with a draft gauge.
Keep in mind that soot can build up very quickly on a MPD causing draft issues.