Thanks Okie, the FEC temp was set for 375 the IR temp is 359. My actual target was 350 on the stone. So I adjusted the temp of the FEC back to 350.
It took about 1 hour for the stone to come to that temp.
You have to remember that this was a cookie dough and not a pizza dough.
I haven't tried removing the deflector, and since this stone is new to me, I haven't even tried a regular pizza. But that will change.