Congrats!!! KJs are nice. On my kamado I have the fan damper at 1/3 open. Also, I manually bring up the temps to my target temp, plug in the fan last. Never overshoots this way.
Curious why the Big Joe when you already have the XL BGE?
36" DCS NG Grill - Vision Kamado PRO - 36" Blackstone Griddle LP-'10 Weber Performer-PBC