I wasn't doubting you, I was only trying to ascertain which style you were working with. In fact, I'm happy you don't have the problems. The issue is that there's no telling how many people use the ABS headliner without issue vs. the problem headliners. Fail ratio is skewed on most car groups/forums because like anything else, normally only people that has had a problem say anything. You're simply one of the non-failures to report the plus side of using the ABS type. And this info is good to know for people on the fence.No factory T top Monte SS prior to mid 1985 model year, so mine is a solid top car. Look, I'm not saying that I'll never have a problem with the ABS headliner, all I'm saying is that its been 7-8 years now with no issues. Many folks may have had problems with them, but as yet anyway, I'm not one of them.
T-top cars have headliners too, albeit small ones. And that makes a difference as it's about 1/2 the weight as a solid top car. The foam backer is pretty flexible, too- when it was new. Which is part of the reason they make the ABS ones in the first place. The foam gets all dried out like an old styrofoam coffee cup, getting brittle over the years and many times some part of it crumbles upon removal and requires some mylar tape. Especially the front corners where it gets pinched down by the visors. So the original foam has its own set of issues. And there's not a whole lot you can do about it as the only replacements are the ABS ones. I've seen the ABS ones displayed at car shows and they're pretty light too.
I still believe that if the original headliner board is still in good condition, then use it. Do the job right and you could maybe get another 30+ years out of it before someone else has to deal with the headliner drooping into their face. 😆
I mentioned using duct tape earlier but I didn't mean the heavy-glue fabric style of tape. They make aluminum foil "duct" tape. Similar to this below. Keeping it strong, but light. I've used it before on the backside of the board without issue.