Well I ordered on of the BMB EVO 2 glass fermenters and when it arrived, I couldn't fit the new universal lid into the fermenter. The actual opening of the fermenter was too tight. I called Northern Brewer and they immediately sent me a new fermenter and universal lid. I got the replacement fermenter today and the lid fit fine. With both fermenters next to each other, I can definitely see that the opening was sized differently between the two. Maybe a bad batch. I'm going to find a glass company in town to try to grind down to hopefully salvage the first fermenter.