That’s when I turned to Givi and its SRA5119 mount. There’s something elegant about the Givi platform, which is meant to support its own Monokey top cases. I like how it bolts to all six of the existing threaded screw holes in the BMW’s rack; six has to be better than four for strength. And I like the natural-finish aluminum. For $200, it comes with the pegs, rubber bumpers, and latch mechanism to carry a Monokey case.