I didn't read all the posts in this thread - just the first 3 pages. First of all, there is very little down pressure on the top rails of these pools. Of course they are difficult to lift, but that's because you are trying to lift thousands of gallons of water above its "natural" level. If the pool base it perfectly level, there is very little downward pressure on the rails. But try to lift the rails and YOU are creating the downward pressure because you're trying to lift the pool contents.
My only concern with what you're doing is that the rail of your pool is going to be rigid. You need to make sure that you have the dimensions proper. NOT A FRACTION OF AN INCH TO LONG OR TOO WIDE OR TOO HIGH. That will create way to much stress on the seams once the pool is filled. I think it would be a good idea to make your dimensions about an inch or two shorter and narrower than the natural size of the pool. Many of the intex now have flexible corners, and I think this would help with your pool holding up to water action.
I'm finding this very interesting, and will be following. Here's to ya for trying this, and I am hoping all goes well for you!!
GC
