Just a heads up for those with the Honda Top Box.
I went out for a blast at the weekend to Poole, up ZigZag hill as well which wasn't much fun as it was covered in a thick layer of gravel

, without the Top Box. When I got back I noticed that the plastic plugs which cover the bolts on the rack were nearly out

They are just a press fit, and it wouldn't be a problem if they fell off, but you may loose them riding without the Top Box.