I ran out of time - it was a last minute question in case anyone was perusing the forum so I ploughed on anyway.
The answer is 'no', the crust won't burn. I preheated the oven to 2, turned it to 3 for 20 secs, slung in my pizza on it's screen and gave it about 4-5 minutes. I then examined the bottom and far from being burnt it was merely firm - hardly any colouration. As it was firm enough, I then took the pizza off the screen and dumped it back on the stone for about 4 minutes. It turned into my best pizza yet! This is only my second attempt since joining the forum and it's light years ahead of the sloppy bread pies I was making before.
I have included some photos. It isn't anywhere near as burnt as it looks, not a great deal of colouration on the sides of the crust though, the toppings on the slice picture look so dark because of the pesto
I don't know what kind of pizza it is but I am pretty chuffed - the dough was nicely chewy on the crust.
I think next time I would turn it up to max from the beginning and do the same thing(screen then off screen for a bit etc). In the future I imagine that using a peel straight on the stone and then on a screen(the reverse of what I have done) to finish the toppings would be the way to go. We'll see, need to get a peel first.
P.S Don't laugh at my dough stretching abilities please.
I simply dust the dough with a semolina/flour mix then, on a baking tray, finger push it until it approximates a pizza shape. There's no tossing or much of anything else..yet. I spend about 30 seconds on it, if that. And I only threw the toppings on to see how the dough would turn out - my next piccies will be prettier.
Any comments/suggestions would be very much appreciated.