VW Volkswagen Polo Gear Shift Knob 12mm shaft

12mm ID VW Polo 6n2 gear knob. Modeled from original and remixed with scull.
Included are the drawings of the original part. So could be remixed in other shapes.

remixed from http://www.thingiverse.com/thing:1446194

PS:
1.When i uploaded it STL was not properly merged together. Now is repaired.
2.Its enough to print a small part of the shaft bellow the visible part and tight fit it to the shaft. No need to print all object
3.There is smaller version, which is normal sized for me. Ther