Heh, yee of little faith! [...I'm sure this is never going to work, there's probably something much more fundamentally wrong with the SCSI one as well, but it's worth a try I guess
] ]'> [] ]'> [] ]'> [] ]'> This is how you learn!There are four little plastic barbs along the top edges. You may be able to push the plastic side rail strip where it meets the metal turned down edge in hard with a screwdriver under each barb in turn to dislodge the barbs, or if not, you can try with a small screwdriver, or carefully with a knife blade, prying the metal top edge over each barb all along each side then lift the top off. (The spring looks the correct size to me!)