Definitely get a metal peel for turning and removing from the oven if you don't already have one. I got mine from alphin.co.uk, much cheaper than ooni and does the job just the same. Do you have a temp gun to check the temp of the stone before launching? Again, ooni ones are quite expensive from what I remember loads of alternatives available on Amazon. Could be worth turning the heat down after launching to let the base cook longer on the stone then turn it up in between pizzas to re heat it. Are you using semolina on the peel to help it slide off when launching? This helps a lot. In terms of wateriness, if you are using mozzarella then trying slicing it up and leaving it out on some kitchen roll for a few hours before you use it. Amazing the amount of water that comes out!