1. Enlarge the opening of the hot end; 2. Add individual low fan shroud for better performance; 3. Add wiring/multi-purposes posts; 4. Add Extruder Gripe (please see the photo for the usage), I am sure you will love it; 5. Add the detachable DIY Fan Guard (I wish all you can post your creative, lovely and colorful design here soon). 6. Some other minor changes, please check it out for funs .......... Enjoy!