Knurling Bolt

Of the various knurled bolt and screw fidgets out there, my favorite is the one that comes with FLSun printers. When I first got those printers, I printed the included model as a test print and found that I really liked it as a fidget, so much so that I wanted to make them as stocking stuffers for family. However, I didn't want the nut to be able to escape. So I took the model, copied the head and joined it at the other end. To print, I printed the nut first (the same number as the bolts I planned to print), then, when I sliced the bolt, I inserted a pause part-way up the bolt. When the pause occured, I then spun the nuts onto the bolts. I then resumed the print. That creates the fidgets! In Cura you can create a pause using post-processing scripts. In any Prusa/Orca-based slicer, you can go into the preview window, bring the slider to the layer you want to pause at, then right-click and select "Pause." I'm not sure about other slicers but all of them allow you to inser