You're wasting your time here in this forum talking about the Kettle pizza, the audience here is decidedly against anything that breaks the current religious flavour of the month. I have one, I used it exclusively when we were in OZ, and I have had stone temps of about 350- 400 deg C, and dome temps of about close to 600- 700 deg C. I have made credible pizze with the KP and cooked Neapolitan style in 65 secs. There's a video of this on youtube if you look for it. The KP works if you want it to, the one issue it has is fuel management and cooking time window. It gets to the right high temp in a relatively short window and is not able to sustain the temperature for prolonged periods as there is no insulation whatsoever. I have seen a version with an insulated dome and that would would better.
Now we are back in our own house we have access to our WFO and for indoors I have an EFFEUNO, so for me there is no need to make those mods, and between all that my KP does not get used though I still have it, and I still use the Kettle for other coal based cooking. When we were out in OZ and we had the Kettle, we made the most of it, and if you have one make the most of it too, never mind the Blackstone zealots, and stuff them - do what you want.