I need to replace my above ground pool liner. We had a leak at the end of the season last year. Could not figure out where but lost a foot of water overnight. The winter cover did not even get put on so the pool is gross and liner getting replaced. It is a much older above ground pool. We took off piece of coping so we could see it and guessing it a beaded liner? Want to confirm before I order a new one. How hard is it to replace ourselves? The pool store wanted $1000 just for installing it when I spoke to them last year but they had made the assumption it was an overlap....which it clearly is not from what I see.