Question as above. The ceiling is sagging to what I believe is a slight amount, judging by level and Mk1 Eyeball. I'm going to have to rip down a portion of the ceiling as this has been bodge repaired and sits a few mm below the rest of the ceiling. Is it worth ripping the whole thing down? The only thing holding me back is the tales of biblical dust and debris. Would overboarding effectively pull the sag in or would it do nothing to help?