So I ordered a skimmer to install and ready to do that today. The pool is about knee deep so the liner is tight and wrinkle free. It's my understanding that I need to cut the "butterfly" gasket in half? As in cut it to where I have (2) rectangles correct? One goes on the outside and one goes on the inside? I assume if the pool had metal sides then you would cut the hole first then install the gasket as it is in one piece. But with it being a soft side pool I need to cut the gasket, install the housing and then cut the liner? Correct? Just checking before I mess something up and have to re-order and wait longer....of course family is ready to swim today but still have more work to get done....