Was wanting to replace gasket , rails screws and cover plate on my in ground liner pool , liner is not but about 4 months old but can’t get guy back out and I know the liner is not correct around steps but was reading where jimmy greek was saying something about clueing a piece on to do this , and I wasn’t sure what he was saying , I know I’ve been worried about draining poolAgain and taking screws out and getting them back in same holes being liner has been trim out for steps any ideas would be appreciated thanks