This... thing.

thingiverse

Customized version of http://www.thingiverse.com/thing:56574 Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=56574 Instructions Using the following settings: Explode Distance Set to Maximum Effectiveness - 1 Unit Target Scale Fully Engaged at Standard Levels - 1 Target Shape Type Identified as Circle Number Four - 4 Outer Ring Diameter of Target Shape Two - 40 Units Inner Ring Diameter of Target Shape One - 40 Units Vertical Projection Offset in Negative Direction - 0 Units Original Rotation Axis of Zero Degrees Vertical Orientation - 0 Degrees Adjusted Rotation Angle in the Horizontal Plane at Maximum Position - 0 Degrees Horizontal Displacement Shift in Postive Direction for Zero Effect - 0 Units Current Oblique Angle of No Adjustment Made - 0 Degrees Target Object Shape Definition Refine at High Detail Levels - 6 Increments Height Dimension Established at 60 Standard Units Vertical Offset for Base Layer Placement Set to Minimal Offset Value - 0 Units Upper Most Surface Elevated Offset Parameter Disabled for Current Setup - 0 Units Factor of Donation for Extending Boundaries - 2 Edge Roundness Enhanced for Seamless Connections and Avoiding Damage with Safety Features Activated