Posted on 29 Jun 2013
i'd like to help as I too have a swift ,albeit a different model, recently changed my road bulbs, the rear clusters on mine were simply held on by 4 'normal' screws, removed those and the cluster just popped right off.
one thought did spring ( no pun intended) to mind , is there a rubber seal round the edge of the cluster which could be giving the impression of a sprung screw ? I've been playing with cars etc for years now can't recall a time when I've ever come across a sprung screw in a light cluster