Still loving your idea of the elevated unistrut attached to the 3rd row seat anchor positions, as the basis for an elevated sleeping platform! In my case, I'd really like to construct a platform that is in 4 hinged pieces in order to convert from bed mode to a double-sided bench (one side of bench facing rear hatch and the other side of bench facing 2nd row of seats). Mine would need to support weight of 2 adults, but I don't want to need support legs underneath in the middle (so it remains completely open for bin storage underneath like yours!). Any advice for me in that regard? Will be beginning work on this project very soon! (I have series 1 L400 LWB Super Exceed V6).