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Nice decision to use the half shafts. I was going to use a socket wrench U-joint, but it's overkill.. Cheap at Home Depot though! I want an LED in there though, so I'm going to give your idea a shot! I was hoping to find your version 2, but it looks like you changed your mind. Did you ever happen to come up with a better eye "joint" before you moved on?
How to convert medical scan data into a 3D printable model (also, dinosaurs!)
Rustic Book Shelf or TV stand
$20 CNC Machine
Easy to Build Desk Top 3 Axis CNC Milling Machine