What a pair of tits me & OH are! We've only gone & stuck our large full length wall mirror with 'no more nails' too low down on the wall. Now when we stand in front of it, our heads aren't shown & we have to bow down! I don't know why we didn't realise we needed it another 20 cm or so higher! It looks silly, proper silly. Is there a way we can successfully move the mirror - without braking it?