1. Re-created all 3D print files in FreeCAD for easier modification by others. Todo: Export individual STL, update instructions 2. In 'modules_tracking/common_tracking_classes.DescribeLargestObject' I changed the datatype from unint16 to int16 as it seemed I was getting overflow errors in one of my rigs. Unclear why this didn't show up before... 3. reorganized .gitignore file