Did my first smoke with the basket yesterday.
The basket worked awesome. I sits about an inch and a half higher, than the fire grate that came with the OKJ.
It is like a 12x13, I put it in where the longer dimension was front to back, so it would sit even a little higher.
Being first time using it, was not sure how many unlit coals to start with for minion method. I poured probably around 6 lbs in there, then lit about 15 in
chimney starter. It worked beautifully, temp slowly came up , when it got to 230 I closed the intake damper about 2/3 rd, temp settled in on 226 +/- a couple of degrees, and stayed there pretty much for the next 5 hours or so. At that point I added around 3 more lbs which more than gave me that additional hour. It was very easy for me to control the temp - however I did seal the lids and put a convection plate in as well.
Next time, I will start with around 8-10 lbs of coals, should give me a nice long burn.
So I can't really attest that the basket itself was why I was able to control temp so well at 226, probably more combination with the other things I did as well.