I've seen 2 versions of the locking system...
I've seen 2 versions of the locking system cam. One uses an allen key, the other appears to be a variation allen/flathead screwdriver. Are one of these a prototype? or associated with a specific production year? Which one is being sold by Backcountry?
Production versions have the combo allen/flathead system. This is what Backcountry has in inventory.