John Macnab combined his wood-turning background and engineering skills to invent a 20-foot vertical lathe capable of turning large-scale sculptures to complicated formulae. With this unique tool, Macnab has been able to re-think the craft tradition and, drawing on his fascination with mathematics, science and the spiral growth of natural forms (from seashells to galaxies), to produce powerful and elegant works that bridges the gap between industrial precision and creative expression.