I’ve done a few attempts since this post. After switching off the vents I have roasted a whole chicken in foil no problem. Roasted Sweet potatoes out of foil and they came out perfect for scoop and mash. Same with 5 aubergines for my favourite curry. No smokiness though which I don’t know if that’s good or bad. And I did season my cast iron equipment with great success too! No longer will the heat be wasted after a pizza cook!