I'm building small parts in order to try a first attempt to engraving.
I bought from China a set of diamond discs, 600-800-1200-3000 grit. It would have been nice to build a table flat version of a sharpener but I have no tiny electric motor at the moment. I decided to use the drill because it's a ready to use tool with adjustable speed and table position-angle. I found the idea in engravingforum.com