This device plus the video has been extremely helpful. Honestly, I have struggled with my scrapers and this worked perfectly!
I own the Veritas burnishing jig, I find the KM jig equally easy to use and gives as good or better hook to card scrapers. JKM has created a great way to sharpen your card scrapers.
I’ve made the vise, I made it with walnut and it came of great.
The guide has raised my ability to properly sharpen my chisels and plane blades. It is much better than the guide with the small roller.
The item held the scraper as advised. I would spend a bit more time making it next time to be a bit more accurate with my cuts. Now I have to learn how to sharpen the card scraper, maybe watch the video again.