There is a new free video for download on the Hock tools website, I found it very interesting as I learned a couple things about adjusting the frog and the cutting depth. I never learned either method before this video. I also fully agree with the quality of the fine grained HC steel as I own two of them, #6 & #8. They really hold a super fine edge in my experience.
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I will be buying more HC cutters for other planes.