D-bot modifications

***caution this is a works in progress*** The parts here are being used to BUILD a modified D-bot with alloy stiffeners. To be clear, they have been tested for FIT but not FUNCTION as the build is in progress (as of April 2017). Feel free to test and let me know if you have an issue, I will fix it. Print all parts in 100% infill PETG or ABS. f3d files are included for your own editing, but please let me know why. As per the spirit of GPL remember you are required to provide editable files