I've been thinking about this mod since I got the rotisserie ring for the kettle. I find that when I bank the coals to one side, I lose almost half the space on my grate...even with a smokenator or "similar" device. I can't cook ribs directly over the coals...gotta move 'em to the "cooler" side of the grill, limiting grill space and the amount of food I can cook thereon.
I drill holes in the ring and installed 4 bolts that support the grates at the top of the ring.
Then I placed the 18 inch heat deflector on the original grates at the lower level, using the snake method for the charcoal.
The heat was even throughout the cook and easy to maintain.
The ribs had a beautiful color from end to end.
The video is done backwards because I didn't decide to do it until the cook was set up.
I hope you can follow it.
Humbly submitted...