Ikea Expedit/Kallax shelf Headphones holder (updated)

After using this for sometime, I have added a hole to the side and screwed it place with a wood screw .

Updated 

• Increase the walls of the shaft to increase strength.
• Redone the tapering to print better

Settings

• Supports under the crossed section.
• Infill 50% for strength of the connection between the shaft and crossed section.