After reading about Givi cases bouncing down the road, I finally got around to fashioning up some preventative hardware. I have always been concerned that a simple latch malfunction could cause a case launch so here is my solution:
Drill hole through top case and mounting bracket:
Put together some hardware laying around the shop:
5/16-18 x 2.5 carraige bolt, 2" and 1.5" ss fender washers, plastic threaded know with 5/16 nylok (nylon insert lock nut)nut, and a piece of old mouse pad cut to shape to act as a sealing washer between the Givi case and the bolt-washer combo. The bolt has a square boss under the head, so by beating that square boss into the fender washer it prevents rotation of the bolt when installed:
Here's the underside all assembled. Previously I added the other aluminum plates in the photo allow me to move the Givi mounting bracket rearward to give the pillion about 1.5 inches more room.
What I like about the plastic knob is that because it is self locking, I don't have to torque the devil out of it to stay tight. Just enough to take the play out between the Givi case and bracket. No more rattling, especially with and empty case.