Simple, easy print puzzle

This is my first attempt at a puzzle, modelled and printed on a DIY prusa clone printer. I had problems getting pieces to fit together, having assumed that you could just make them smaller (!!) - however the whole puzzle then just shrinks! In the end I ended up writing an OpenSCAD script which generates the puzzle pieces from an array with an appropriate tollerence. The puzzle was first designed in excel, before generating the pieces in OpenSCAD. I am happy to share this code if anyone finds it useful!