Cylindric puzzle

I found video with this puzzle and I like it, so i decide to print in. I hope you like it to. Unfortunately you have to assemble puzzle so you know solution, but is nice puzzle to have in collection.

Puzzle have 2 main parts (top and bottom), spring and five balls(ball-bearings)
Main parts you simply print, balls you can print half of ball and glue them with CA glue, or use any 8mm ball from ball-bearing.

Spring was bit tricky part to make, but I hope I find pretty easy solution.
Print part spring core and cut about 25 cm of PLA filament(1.75mm diameter). Dip filament into hot water and filamet become soft almost immediately, so you can wind it up around spring core and repeat until you are satisfied with spring. trim rest of filament and you are done


video review of original puzzle and revealed solution
https://www.youtube.com/watch?v=8rVz6Cnj2AY

original desing by William Strijbos