At the bottom of the mast track, Ariel 82 has a "swivel bracket" to keep the mainsail sliders on the track when the sail is down. To take the sail off (or to take a slider or two off when reefing), the swivel is pivoted 90 degrees and the sliders come off. I think this was original issue.

The problem is that occasionally the swivel is inadvertently pivoted the 90 degrees and, when dropping the sail, all the sliders accidentally come off.

Does anyone else have a different or better system to retain the sliders on the rack that is a bit more deliberate?