Mini Passive Mixer 3D Print Model

Summary
Plans and more details here : http://therandomlab.blogspot.com/2015/05/simple-passive-monostereo-to-stereo.html
This one does not match the schematic exactly. It has two stereo channels and one mono channel into one stereo out. Used 10K potentiometer, 1K resistors, and 1uF Capacitors.