Now with the laterals in place we need to locate the chair. At full scale you can sit in it and slide it back and forth until you feel at one with the Universe, although at this reduced scale you'll be working by eye.
As it turned out anyhow the pair of lateral spars proved to be equidistant from front and rear of the space-frame, but this is as good a way as any to be sure.
I have now taped the seat in place, and you will shortly see why.