hanayama cast donuts puzzle

this is a scale replica of the hanayama cast donuts puzzle 

the challenge is to put it together so that it there are two donut shapes interlocked with one another like in this picture and then be able to take it apart too

this is certainly one of my favorite puzzles (second to the cast valve which i will try and release next week)

print properties:

i recommend a 0.2mm nozzle (0.4mm can work though it is not as smooth to play with)

supports are required

a denser infill makes the puzzle feel nicer in your hands though this is just preference and not a requirement