hi Jonas,
I was intrigued with your posts. the end result explains all. Looks Great. I'm On my second intex ultraframe 16' round pool using salt system in St. Louis MO. I don't take down during our frigid winters, as supposed to. Merely cover, remove pumps, hoses, etc. Can't complain getting 5 years use, considering the price. ( I do get my spray can of matching rustoleum paint to spray any spot beginning to rust ).
I don't understand why Stainless screws are believed to be safe, as mine rusted in ladder & fountain. Wondering if salt system / any copper presence was the culprit? I just keep an eye on them & replace. Best wishes! I'll be watching.