I cut a piece of expanded metal 4" X 45" brought the ends together and bolted them so I ended up with a 4" tall hoop 15" in dia. I put it on the coal grill and put a mix of lump and brick with some fist sized pecan around the outside of the hoop leaving about 3" unfilled.
I lit about 8 pieces of lump in the chimney starter about 2" square and placed them at one end. Opened the intake w/o and place the lid on with my themo probe on the grill.the temp came up to 213 deg in 10 min. I closed the intake to 1/3 open and it rose to 254 deg and settled in at 250 deg with a 3 deg drift up and down.
After 4 1/2 hrs I had to look. Much to my amazement only about 6" of fuel had been used. The photos prove this if you look at the position of the fire in relation to the handle on the right side of the pic.* {the first pic was shot from the opposite side.}
After 12 hrs the Butt finally hit 204 deg. I was at the end of the coals. I'm still in denial I didn't touch anything all day. But I have fallen In love with my Weber kettle all over again. I tell y'all this thing is a "BBQ Machine"! heres the Butt ready to be foiled and head for the cooler.
