I was going to ask what is the measurement across your pool between the narrow point? Ours is 13'6", then swirls out to 17'. I didn't ask the PB that question.. doesn't really matter I guess, but when I measured it, I was surprised a little.
When does your PB recommend you seal your flagstone? I'll ask ours too. I wish I had put flagstone on the tanning ledge - was going to, but chickened out because of the "salt problem" we decided not to. My BIL has it on his in Frisco - 10 years and no problems at all. Must be the luck of the draw.
Have they laid out your concrete forms? It's all looking sooo good!