Rotating rings keychain

This is a customizable keychain with rings. Create a fancy business card for yourself or someone you want to impress. Or simply think of it as replacement for some ugly keyrings you always wanted to replace.

__WARNING: The Customizer here at thingiverse does not work with this file at the time of writing__. See below for a workaround, i.e. install OpenSCAD on your own computer. That being said, it seems that some folks managed to get it working.

The uploaded STL files are just examples. By modifying default parameters or by writing custom function calls in OpenSCAD you can create your own custom made keychain or Christmas present. See below for technical details.

Unfortunately there is a problem with the customizer at thingverse. You may have to install OpenSCAD on your own machine and either modify the OpenSCAD code or use the local customizer. You can change many parameters (too many maybe), e.g.
* radius
* height
* number of segments (rings)
* spacing between rings
* l