you'll need to make up some fixings for the Vario base. Several people on here have done just that. It might be worth PMing Clive, he has the Vario top box and I'm sure he'd tell you how he did the fixings.
When wife and i went on our honeymoon to lake garda, austria and germany on the 650 bandit i had yellow vests made up that said 'Just married' and 'Frisch verheiratet' on them.