On my KJ for 225 range I use 1 Weber starter cube, place defuser, leave the top vent and bottom vent wide open till 195 then the close the bottom vent to 5/16" and the daisy wheel to 1/4 inch, (I have literally measured, sad I know...) and after about an hour from lighting I'm at a good and steady 220-235. I place the meat and it takes a few minutes to hit that range again. After about 3 hours it will creep to 250 then slowly come down. But depending on what your cooking a lot of BBQ is forgiving.
Kamado Joe Classic, 22.5" OTG, UDS