Very simple really. I just used a relatively cheap standard Trend dovetailing jig. I basically made a standard corner using one board of the Ash and another of the dark wood (I think it was Iroko) and then glues them together. When dry I cut the dark board flush with the Ash on the bandsaw and sanded everything flat. This gave me one Ash board with the dark dovetail feature already on the end. Then is was just a case of running this board with another ash board back through the jig to make the feature run arounf the corner. I waited till all the box was together to round over all the edges to complete the look.