I had problems with my big mouth bubbler the first time I used it. I called up NB and they send me out a new-style lid for free. (Universal Lid - shown on p.17 in Midwest Supplies Catalog, Late Winter 2017). I've never had a problem since! The old style was screw-on, the new style has 3 seals around the edge and just pushes right into the bubbler, but has a wide lip to prevent it from going in too far. That worked swo well, I talked the guy from Midwest into sending me the same style of lid for my little big-mouth bubblers. No further problems with the 1.75 gallon "Little Big Mouth Bubbler" after that! It took some argument, because he said they had never had any leakage complaints for the small ones, but I did, so he replaced all three for me!
On another note, When I was much younger, I worked in a glass shop and used diamond drills to drill holes in glass - aquariums, mirrors, etc., but the difference here is that plate glass has a different makeup than bottle glass, especially if the bottle glass is meant for hand-blowing. I was thinking of maybe using one of my glass LBMB 1.75 gal and experiment at drilling a hole in it for one of these racking adapters. It would be a pretty costly experiment for me if I failed because they don't list them for sale anymore in the Midwest or the Northern Brewer catalogs that I can see, and they work just great for split batches/experimenting with different ingredients or yeasts; but if it works, it would sure be handy! I believe, at the time, they were only 12 or 13 bucks each, so I bought 3 of them. Maybe ABInbev decided they were not enough of a money-maker, shame, I was planning on getting a couple more!
Bill, Thanks for this article!