I just realized that this was for the plastic BMB's. On the Glass BMB's the original top was also screw on, but didn't have a separate ring and insert. It was all one piece. Also, in the original ones, the hole in the top was a really weird size. No stopper I have will fit it right.
I just finished a batch using the new universal top. It stayed in sort of, but I had to keep pushing it down further. It never came all the way out, but I'm sure it was leaking somewhat.
After using it, I definitely think your idea to combine a screw on outer ring with the new silicone gasket is a great idea. I just don't see how to combine the parts I have for the glass BMB to make it work.
I just finished a batch using the new universal top. It stayed in sort of, but I had to keep pushing it down further. It never came all the way out, but I'm sure it was leaking somewhat.
After using it, I definitely think your idea to combine a screw on outer ring with the new silicone gasket is a great idea. I just don't see how to combine the parts I have for the glass BMB to make it work.