My 54's headliner is sagging BAD. Granted - it hasn't seen the inside of a garage since the new headliner was put in 10 years ago. The guy who installed it for my father didn't get the liner all the way forward. You can see 1/2 to 3/4 inch behind the rear trim. It looks like he needed to push it farther forward, or farther up when he did it.
