It's easy to see why the original one was lost.
The spring doesn't even touch the screw, so it's free to turn.
What could be wrong? The wrong screw? the spring?
Anyone with similar sight care to take a look at theirs and compare it please?
Those interested in the technical details of the photo...
I used a Nikon D-70, with a 28-80 zoom. 30seconds @ F29 ISO200 Fluorescent light 60mm lens with a cheap and nasty macro attachment.