Friendly Articulated Slug

Update on June 21, 2022:
Thanks to everyone who has been printing and sharing this design! When I first uploaded it, I had no idea that what I considered kind of a goofy design would be so popular! It is very cool to see how far it has come. In light of this, I've decided to start offering prints of my designs for sale at Copperkeep.com. Check it out if you'd like to help support my design work, and if you'd like to see my latest creation!

Original Description:

Due to a ridiculously convoluted inside joke involving racing lawn mowers, songs by Rush, and home-grown potatoes, I decided to make some articulated slugs for my family for Christmas. My main interest in this project lay in the joint design. I wanted to design a joint that would print in place, fully assembled, with no support, no visible internal workings, and with as much freedom of movement as possible. After a lot of work, I finally designed a joint, and a slug, that I'm happy with. Now I am entrusting the model to you, so that you too can begin the day with a friendly slug.

I've provided two STL files, one with built-in brims on the slug's feelers and one without. I wanted to have a built-in brim on the feelers so that I wouldn't have to enable brims in my slicing software. Use whichever you like.

Print Settings:
This is a complex model that contains lots of thin walls and steep overhangs, so it needs to be printed slowly and carefully. I use a layer height of 0.1mm, and a top print…