Wow Al, I didn't know that about the liner thickness, I ordered the 20 gauge and just thought it was the same as 20 mil, I haven't had any problems so far, but I keep checking it because I installed it myself. Like I stated earlier, I have had real good luck with them as far as shipping and price, but you never know!!!
We don't have any real good pool stores in my area, and when I was asked how I sanitized my pool and I told them BBB, they about kicked me out of the place, like many others here I occasionaly stop by to pick up a part or something, but that's about it. Most of my pool equipment shopping is done online.

JD