An articulated wiggly spider that I designed. I iterated to try to get a good amount of movement. Print in place, no supports needed. I'm working on different versions, please comment requests. 

Settings:

0.2mm layers (I use at least) but go whatever

100% scale is a good idea (tolerances, but you could probably get down a bit lower)

1.6mm shell, 5% gyroid infill (strong, keeps pin and hole at 100%ish infill without huge amounts of filament)

I use a brim for adhesion (but it should be fine without it)

Ironing- your choice (I use it)

NO SUPPORT- prints fine without, support clogs the joints
 

IF YOU WISH TO SELL THESE, EMAIL ME AT froggo3dprinting@gmail.com to discuss. OTHERWISE, IT IS A NON-COMMERCIAL LICENSE. (I sell these models myself and competition for my model is not something I would like to have happen.)