Lopi Yankee Bay Insert Door Adjustment

Last week my stove started burning badly, and it seemed like the fire wasn't getting enough air. I checked the door seal using a dollar bill as shown in the manual, and found a spot that had a leak. I adjusted the door as said in the manual and couldn't get it perfect. It always ended up with the upper left side leaking some. When I could eventually get that spot right, a leak would then open up somewhere else. I ended up shimming behind the rope seal for now to get a good seal, but I would like to just get it adjusted correctly. Does anyone have some tips on the best way to do this? I've spent a few hours on it already, and it definitely seems like a time consuming process. Thanks!