Originally Posted by Fwismoker
The only thing in between my charcoal basket and the cooking grate in my little mini which is only maybe 8" away is the steamer pan that comes in the tamale pot and it does just fine so that should give you an idea.
When you think about the word "diffuse" that's what they do. I like to call it a blended heat because it's not direct and it's not indirect.
I do the diffuser in the mini, my Jumbo mini and my UDS....You'll have zero issues having multiple racks in the UDS with the flat lid.
I just thought with holes or slits in all these diffusers that direct rays of heat would still be hitting your meat.