Gikey, the gyro keyring

Gikey is very easy to print, actually is designed to be printed without supports and prints good in PLA at 0.3mm and 0.2mm resolutions.

The new version made in OpenSCAD that can be edited in CUSTOMIZER.

The uploaded file is made with the custom settings:
Gykeysize=15;// [12:Small,15:Medium,17:Large]
lenghtGikey=14;// [12:Small,15:Medium,17:Large]
//size of the nozzle of the printer
nozzlesize=0.5;// [0.1:ReallySmall,0.1:Small,0.2:Medium,0.3:Ok,0.4:Large,0.5:ExtraLarge]
//The wall size is this times the nozzlesize
wallsizemul1and2=3;// [1:Thin,2:Ok,3:Large]
//The wall size of most internal is this times the nozzlesize
wallsizemult3=2;// [1:Thin,2:Ok,3:Large]
//Space between layers multiplier
Layers_Space=2.8;// [1:Thin,2:Ok,3:Large]

Old Version:
If you want to modify the file, just go to (https://tinkercad.com/things/22DUMc27624).
Thanks to (http://www.thingiverse.com/thing:644217) for your excellent idea. Gikey is different because the inner rings are scaled versions of the outer one in the three axes. I found that easier to print especially with DIY 3D printers like mine and also have a smooth rotation. i.e. (https://youtu.be/kKWDhZBpK_Y).