I know this doesn't address the question regarding a Givi, but it is related information. I have an 07 with an OEM top box and OEM mount plate for the top box. I have a Sargent seat and had ordered the matching backrest. My intent was to use the backrest only when the top box was off the bike. However, the Sargent backrest won't work with the top box off and the OEM top box mount in place, as the backrest will not slide fully into its mount in the seat. I worked with the representative from Sargent, who provided excellent service, but was unable to find a solution for what I wanted. As I didn't want to remove the mounting plate each time the top box was off and I wanted to use the backrest instead, I returned the backrest.