I recently saw this on Amazon and figured I could print that. I’ve also been wondering about embedding an object into the middle of a 3D print, so I figured this would be a good project. So I bought these blades, and measured them, and started working in Fusion 360. In hindsight, I think that some jigsaw blades would have been easier when modeling since there aren’t any weird angles to deal with. Either way, it wasn’t too difficult.