[Charles.Robinson]

Be aware that Givi boxes have a habit of falling off on bumpy roads. Drill a hole through the bottom of the box and the rack and use a roller pin and clip or a nut and bolt to secure it to the rack.

Huh? I have never heard of such a thing and have been running Givi side and top boxes for 20+ years. If you drill a hole through the box, you've lost the nice waterproofness which makes these so great for carting gear around with you.