I may consider getting a hard case as well, to store helmets. For safety and comfort I usually drive with a helmet on, but if you’re two up and you want to drive with the wind in your hair ( or in my case, wind on your balding head), there really isn’t any where to store them comfortably in the car.
Richard - haveto say I leave the helmet(s) inside with the tonneau done up... in a soft helmet bag, down in the footwell. Probably one could lock the bag in to the chassis if needed. Then again those motorbike topboxes for helmets storage don't look too bad!
