Ottoman Bed foot risers (Extensions for Roomba)

Dunno if this will be any use to anyone else but we've got an ottoman style lift up storage bed bought from Bensons for Beds about 4 years ago. The bed has around a 2" gap under the frame and storage floor, being just high enough to collect a ton of fluff and shite but too low to get anything under it to clean it. The feet are just blocks of wood with a pair of Allen mushroom head bolts securing them in place. The centre section has a pair of steel tubes with a plastic foot screwed into the ends. So I made these riser which fit into the existing feet with the locating lugs and secure with longer screws into the original securing screw holes. There are also a pair of support extensions which locate in the centre of the bed to support both storage compartment floor and the middle of the bed. This allows my Roomba to pass easily under the bed to do its stuff whilst keeping the bed low enough that oxygen isn't required. It picks up the entire bed by an additional 80mm which to be honest, I think is a more sensible height anyway.