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I know that "other" kamado style grills have the felt around the top. Here's the thread where I saw it last night - http://eggheadforum.com/discussion/1149335/virginal-flight-of-the-mini#latest
"Entrepreneurs are simply those who understand that there is little difference between obstacle and opportunity and are able to turn both to their advantage."
You really don't need it. After you bust that second Green Top you remember to pull it off first BEFORE opening the lid (take my word for it, you do). I don't use the DFMT at all so that is not a problem for me. But if you do and put it on the correct way it will not fall off (at least it would not fall off for me when I used to use it). Just another good reason not to use it...