String Swing stopper

I hang my instruments on a wall using a String Swing. Because I have kids running around, I decided to add a stopper, just in case. 

Print in TPU. I used the Overture High Speed TPU for mine.

Because the String Swing is made to be adjustable for different neck sizes, I'm including the .f3d file as well. You should be able to simply adjust the parameters in the file to fit your needs.