I was inspired by T2 Bacteriophage by 1radboy. I had trouble printing his design because it had rounded legs, so I made my own version in OpenSCAD. (http://www.thingiverse.com/thing:336609)
It also uses the Icosahedron OpenSCAD code from Adam Anderson (blepfo) (https://www.thingiverse.com/thing:1343285)
You can customize the number of legs, and the leg diameter in Customizer.
I've printed in at both 100% and 150% size in PLA without supports with .25 and .2 layer height respectively. Watching the legs print was stressful, but they did stick and print. Avoid printing it with smaller layer heights because that may lead to PLA curling.
On the Ender 3 I'm able to print it by enabling z-hop at a super-tiny 50% size!
Bed Adhesion: I've only had success using blue painter's tape.
Use blue painter's tape.
Print slowly, around 25-40 mm/s.