Customized version of http://www.thingiverse.com/thing:976416

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=976416

Using the following options:

Spring_Right_End = 0
Right_Hole_Type = 6
Proofread_Spring_Diameter = No
Printing_Helper = Yes
Left_Hole_Type = 6
Spring_Windings = 7
Right_Hole_Diameter = 8
Left_Hole_Diameter = 8
Spring_Left_End = 0
Spring_Outer_Diameter = 9.1
Spring_Coarseness = 80
Spring_Wire_Diameter = 2.2
Spring_Length = 35