Originally posted by Green Dragon
You will never encounter the cracking problem that so many others have.
Dragon Bob
He may... it's the plastic that the insert is made out of that is the fragile part, correct? Even if LineX was applied to the top, the screws are still tightened from the bottom, thereby still forcing the plastic to buckle from underneath, correct?

LineX may make the insert a bit more solid, and may look better matching the rest of the cladding, but I would still watch how tight you tighten those bolts!