I decided that I needed a better way to keep the stuff behind my seats stored away. It was just on the floor, so I made a storage box to fit on the riser. My original thought was to make a hinged lid, but the plywood in the garage was not long enough. So instead I used the trunk size cargo net, which I already had, rigged up (linked to eye bolts in the back, carbiner clipped to the seat belt bracket up front) to hold the stuff down. Probably more secure that way, anyway, and gives a little more flexibility to putting things in. If you take everything out, the hatches in the riser are still easily accesible.