I've been reading closing threads. .......A couple of questions for closing the pool for the first time here in MI. It's a used 21' AG. The pool came with a black "plastic" winter cover (has a copper wire running around outside through grommets and a single pool pillow. My questions are after draining below skimmer and return lines, do I leave the skimmer attached to the pool? I'm worried about taking it off and on and wearing the gaskets out by removal every year. Looked into the aquadoor, though it seems unnecessary if I plan on draining below the return right? My plan was to remove the "eyeball" of the return and leave the hole unplugged for winter water drainage. Do I remove the gasket at the return as well? ......Not sure I trust the pool pillow to hold the cover up all year as it seems like a cheap blow up. So, I like the idea of covering until leaves stop falling and removing the cover. Does this make sense? Anything I'm missing?