Today I used a Lego part, https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0219 one of the pieces that holds the train tracks together in the package, as the basis for a replacement part for my the power switch on my coffee grinder. I had to drill out the center with a 1/16" bit and then used my drill as a microlathe to cut off the flange and round the end of the part.