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  Back Focus is the Society magazine published 4 times per year. Each issue is typically 28-40 pages and circulation is limited to members of the Society by mail. Articles are by members with specialist interests, and reflect exceptional levels of research.

A full version of this article by member Kev Franzi from Back Focus #109, including some wonderful images can be downloaded as a PDF by clicking here.... and look out for some more on the technical side of this story in a future issue of Back Focus