First thing to do -at least in my case- is to remove the pannier racks. These are SW-Motech Quick-lock, so with 4 half turns on each side they were off. Easy peasy.
Then the seat comes off.
Then it's time for the Givi top case carrier. First the passenger grab rails need to go. Pop off the plastic caps and undo the hex bolts. 2 on each side.
Then 2 more hex bolts for the givi carrier. Off they come.
Finally the small original top case holder and the thin plastic plate held by it are removed. 2 nuts underneath the tail and it is all gone.
Now we're left with this: