Custom threaded sphere / ball / marble generator

Welcome back witches and wizards! Since I needed some propper printable, easy to print marbles for an upcoming project, I made this simple marble generator, were you can create to halb spheres with threads and a threaded rod to hold them together. Works pretty good, no glue needed but if you want to make sure nothing ever loosens, you could use superglue. It is perfect to replace marbles or balls from games (like marble runs, kickers and so on. How to print? No supports needed. Only important thing: Merge the 3 objects (otherwise you won't be able to take the next step) Activate adaptive layer height, to get the spheres as smooth as possible.