Cylindrical Surface Sander

This wasn't my idea, I must say. I borrowed this tool after seeing it on Aliexpress. It seemed very convenient to me for working on curved surfaces. And since they also sell a 3D-printed model in the store, I decided to make a few modifications, including adding my own screw knobs. As for how I assemble them, many of you may have already seen it in my previous works. But for those who are new here, here's a brief explanation: I tap an M3 thread in the knob, screw in the screw and fix it with superglue. This creates a reliable connection, and such a handle lasts a long time. The bolt used for this particular handle has a concealed head with a length of 18 mm. And, of course, I use an M3XD4.6XL3 nut insert. Among the links, I've included various options for adhesive that I use. Any of them will work for all the projects. In addition, I decided to create a storage case for three tools with different grits of sandpaper. Based on my experience with plastic, I usually find 2-3 di