Mildly patriotic dual-colour spacers for Canada Day!
The default version should be set to pause for the colour switch at 13.50 mm when printed on an Afinia or UP printer.
The included "blank" file can be used to make a spacer that will fit your ear. Just union() a new cylinder onto there in OpenSCAD and you're all set.
The leaf shape was derived from Wikimedia Commons: http://upload.wikimedia.org/wikipedia/en/c/cf/Flag_of_Canada.svg