I always had problems trusting my Givi topbox to go offroad. I think I have the solution. I bought a plastic ammocase from outdoor wharehouse and strapped it onto a piece of foam.
Tomorrow I will know if it is solid as it feels
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106003.jpg
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106002-1.jpg
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106001.jpg
Tomorrow I will know if it is solid as it feels
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106003.jpg
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106002-1.jpg
https://i101.photobucket.com/albums/m73/ZvtCtb/bike271106001.jpg