Re: EMAD2: foam ring keeps falling off
I have this problem, too. Even after making sure the foam ring is perfectly tucked into the plastic sleeve. I think it's just the vibrations gradually loosening it up.
My solution = tape.
A small strip of tape on the plastic sleeve then tucked under the foam ring. I did it in four places: top, bottom and on the left and right to create a plus sign shape.
As long as you're not forever changing which ring you use, I found this solves the problem :)