While spraying some wax on things (nonstop rain lately), the V46 moved around. WTF?
Looked at the mounting pin (the triangular thing) and discovered it was barely hanging on by one screw and a few threads.
This is a Premier rack with their mount kit and the mounting pin screws in place. Well, it got itself unscrewed. Would've hated to have $300 worth of top case go flying pass me on the Interstate!
I added new screws and some blue Loctite, but will be keeping an eye on this. You got a similar setup, might want to check it now and then.