This is my version of a rock crawler buggy. My main goal was to create a suspension that moves naturally and allows for extreme positions. 3MF file for multicolor printing included.

Check out the video: https://youtu.be/JWal8fMdAns

No suppots needed. I suggest using walls with at least 3 perimeters. Make sure you have good adhesion to the print bed, if necessary use an additive. Use a little silicone spray or mineral oil (baby oil) to smooth the movement of the parts.