I've had my new '09 650 for a few weeks now, and would like to add a top box. I've looked at the Bestem and GIVI sites, and am leaning towards the Bestem 2012 box, in white. It's slightly smaller than the 929, but they tell me it will still take a full face helmet. But from this thread, I'm concerned about the base plate. Will the installation cause me problems? They call it a "universal" mounting plate--does that mean I'll have to mess around with it to make it work? Thanks in advance for your advice.