Dremel Blade Sharpener Remix

I wanted to make a super basic blade sharpener attachment for my dremel clone rotary tool. I found [SonOfSparta's design](https://www.thingiverse.com/thing:927925) and I liked its simplicity.
However, I use a cheap chinese dremel clone (Powerplus brand), which uses an M19x2 thread, so I had to recreate the original file using the correct thread size. I gave it a much smaller opening hole at the top because I only had a 6mm grinding bit available at the time. I also gave it an internal chamfer