I'm still using mine without the notches because I just haven't got around to it. It works just fine. I did do a beer can chicken and found the rack sat too high. I thought I would try using the KJ deflector with the cross braces that came with the lava stone on my vision pro. Worked great. Still enough room for heat to get around and the vision pro grill sat on top of the firebox as it should..
I do like using the KJ rack for pizza and slow cooking though.