I've just seen a line drawing of the Northrop N-31 cargo flying wing concept and immediately thought of the XB-35 . This looks as though the nose and the tail are from a Boeing B-29 or B-50. A four engined or twin engined using contra-rotating propellers, although the wings are swept back on the N-31 to 37° and looks remarkably similar to the Convair flying wing sketches.
I think that I can build this but it will be a future whiff.
