DIY: Build an Animatronic Servo Tail w/ 3D Printing

So you want to build a moving tail for your next cosplay project? The folks at adafruit have you covered. They have published a guide that shows how you can build a simple animatronic tail using an Adafruit Trinket and a micro servo. You will also need a power source and a 3D printer to complete this project. The below video shows how this tail works:

The good news is all the parts and instructions are available on Adafruit. Even if you don’t have a 3D printer, you can still complete this project other ways. What do you think? How would you improve this?