before going into this pizza making I thought cast iron would be a good platform, cooking here we use iron or ally and i've worked on car engines and other metal related repairs in the past, ally would be too fast
doing some searching it seems to be the case and led me back to pizzamaking.com and heston's cast iron pan trick
edit

don't have the final pizza pic, had a crowd gathering and it quickly went. Still don't have a stone or plate so it wasn't that crispy underneath although much better than before, cooking time was 5mins, can't remember exactly. getting to 525f wasn't very long, 20 odd mins
Got my mind set on a cast iron or steel plate or maybe some quarry stone if not and to also use the top oven and grill, pre heat the iron plate. unfortunately I can't use both the top oven and grill at the same time, would be ideal if I could, perhaps I can mod it.