My skimmer is cracked from a couple years ago and I have been patching it with pool putty. I bought a new skimmer to replace it. Will I have problems with the liner moving when I remove the face plate screws? The liner is two years old and is a unibead style that is hooked over the wall with a bead receiver over it. I am not worried about the top, only the cut out area and the screw holes lining up again. I will lower the water level a little below the skimmer bottom. Just a little afraid to remove it.