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The design of the spinner is classical. But for the weight I use nuts with a spanner size of 19mm. You have to print the spinner.stl two times and if you mount it, there must be space between the two part. The advantage of the spinner is, the bearing and the nuts can't fall out. And if you want the spinner to get heavier, just screw in the nuts. For the button in the middle, I print a male and a female threaded part.