BasHub 
Notice: LEGO Technic axle compatibility not tested.
The Lego axle size 2 from (http://www.thingiverse.com/thing:66884) is needed. (not included)
v 1.04, 2 Jan 2014 : Added parameters servo_hole_ID and servo_hole_OD
v 1.03, 29 Nov 2013 : Changed license from CC BY-NC-SA 3.0 to CC BY-NC-SA 4.0 and added comments to parameters
v 1.02, 26 Nov 2013 : Removed parameter slot_height
v 1.01, 22 Nov 2013 : Changed license from CC BY-SA 3.0 to CC BY-NC-SA 3.0 and added parameter hub_type
v 1.00, 03 Sep 2013 : Initial release