Hanayama Quartet Puzzle

Inspired by the Hanayama Cube Puzzle by the user DocBiber I realized, that the original puzzle isn't really a square, instead it's a rhombus. So I created this one, because I didn't find a correct one.

Try to solve it first without any of the solutions that can be found on Youtube! 4 figures can be formed, but the linked rings are really hard to solve ;-)

Update on 8/2/2023:
Here I found a version of this, called Huzzle Quartet Puzzle:
https://jpgamesltd.co.uk/buy-puzzles/HANAYAMA-QUARTET-Puzzle

Maybe You're also interested in another puzzle from Hanayama that I made:
https://www.thingiverse.com/thing:6152718
https://www.thingiverse.com/thing:6176181