I suspect that Kahlila wears something like this under the bustled Steampunk outfits she favours for our trips off. She always seems to have the right spanner for the job. <<<< Probably my character Perri.
"The Platonic Solids," by Bob Rollings, "a cabinetmaker who turned to geometry in retirement. This is a set of the Platonic solids, the five three-dimensional forms whose faces are congruent regular polygons.