Hello! I am very happy to find what's looks to be a sincere great pool forum. We live about 15 miles East of St. Louis and are in the middle of a backyard overhaul, which includes our first pool. We have 3 boys (7, 5, & 2). Our pool will be a steel wall, concrete floor, vinyl liner. It's a 26' by 42' variation of the mountain lake design. Have a great day.