why not cut it out 4ft square if its nice and thick screw up a peace of 9.5mm plasterboard then skim sorted it will be stroner then the old celing
scrim the joints then feather in with filler and sand it back to stop it cracking
tell you what i can do m8 i can fit you in sunday/monday
£70 with mats hows that sound m8
jon 07536957847
