Polargraph LED Gondola by Stephen Kongsle (kongorilla) is released November 29, 2013 under the CC-BY-SA license: http://creativecommons.org/licenses/by-sa/4.0/

www.thingiverse.com/thing:38216 Parametric Battery Clip by holgero was the basis for my battery holder. Thanks, holgero! I rebuilt the mesh entirely and changed the design somewhat, mostly to make wiring easier and battery removal less a struggle.

www.thingiverse.com/thing:29734 9G Servo in OpenSCAD by TheCase was used for size reference, and is included in the .blend file. Thanks, TheCase!