So we have non-functioning fiber optic lights. We are not at all handy and don’t want to mess with anything (ie-trying to retro-fit) and also, I’m cheap! So i have a vinyl liner and want to use those little battery operated pool lights that stick to the wall. Unfortunately, the suction cups are not strong enough-they keep detaching and ending up in my skimmers. They do include a metal plate with some adhesive that will hold the lights magnetically. So my question is, would you advise against sticking these metal plates to my liner?? I really want lights but cannot spend an arm and a leg right now! Thanks!