anyone built their own rear facing bench seat?

[gwyn1971]

Hi, Im looking to add a decent rear facing bench seat in the back of Gwyn, yep I will lose the walk through but need the extra seats/storage. I am keen on ensuring legal and anchorage points are used as putting the ever increasing tribe inside thanks in advance if anyones got any inspiring diagrams or pics for a weekend of splinters and homer simpson style casualty trips. cheers jase