My horizon convection plate came in about a month ago. ordered it before Xmas had to call to find out what was going on. They had them in stock and shipped that day. I am still tinkering but so far in several test burns I have maintain even heat all the way across the cooking chamber once It got up to temp. Thermos at firebox bout 6 " in ( I use a loaf pan full of water ), 1 in the middle tip even with the stock thermo, and 1 at the chimney extension. I have the plate sitting on 1 of the fire grates, I tried raising it with 1" square tubes, but didn't work for me. I also built a fire grate keeps the charcoal from falling through and helps to maintain heat longer.