Dear Charlie, It is a great pleasure joining Your Excel Masterclass. I myself work as structural engineer, with daily routine on a construction site. Neverteless, I find Your universal approach excellent, with various applications in my field of work as well. I`ll try to emprove my skills and apply them on structural calculations, project management, together with CAD design, appraisal, etc. So far, I have finished three modules, waiting for best to come, in rhytm which my daily routine allows me to. Thanks for Your inquiry, sincerely Yours, Mladen Dundjerovic Krusevac, Serbia