Pool construction will be starting this coming week. We previously discussed with our pool builder about adding a sun deck. The kit he ordered did not come with walls/parts for a sun deck. He mentioned that he will form out of rebar and concrete. Will have 2-3 steps coming down to a 4’ bottom. I’ve seen in other Pool plans that those kits had specials panels/stairs for the liner to “fit in to”. Is forming one from a scratch a good idea? Will the liner want to pull away from the ledge and steps over time? Any thoughts or opinions are appreciated. Thanks.