We just put an above ground pool up. My husband installed the liner and would not worry about making sure it was perfect. Now the pool is almost full and there is a couple spots where the liner needs to be pulled tight. There are a couple wrinkles due to the fact that there is too much liner slagging down. Is it possible to pull the top rail and to tighten it? would the water help hold it in place or make a mess? I can take pics tomorrow if you would like to have a visual, it is too dark out now. I would appreciate any advice!!! PLEASE HELP!!!