Has anyone have experience with this? Watching one of Dons Utube videos on drilling oversize etc, I came across a comment that said the screw machine guys routinely do it to hit a size. After giving it a go im impressed so far, after about 15mins messing with 23/64 stub drill I got it to make a pretty decent 3/8 hole bang on .375", after a 100 or so parts the drill rod at .374" is still a nice slip fit