i have a full length gu door lock fitted, with two 'nibs' above and beneath the main lock that extend out when handle is raised fully, something is wrong, nibs struggle to extend out fully now which leaves me unable to turn key and lock door, and when unlocked, handle droops down, i have solved problem temporarily by removing brass nib receivers from door frame and opening the holes a little thus, allowing nibs to extend and enter fully with nothing to restrict their movement, as it seems the slightest side pressure on nibs from door frame meant lifting handle wouldnt extend nibs out fully to allow locking the door, can i repair this problem or what? thanks so much
