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Hi, my name is Brian White and I live in Victoria BC canada. I made a cob solar cooker and I made pulser pumps in the past and solar funnel cookers recently. i invented (as far as i know) the mechanical mathematician for making parabolic and compound parabolic dishes with simple tools. Currently I am working on an educational project about heliostats and on a project that uses software to evaluate different shapes for solar cookers before you make the shapes.