BUG FIX :
If you have a profile, you need to enter your name and password EXACTLY as you created it in your profile.
I have never used such a blade.....the only place I've seen one used was on a YouTube channel called "Ishitani Furniture"......watching him might answer some of your questions.
I'm under the impressions that if you want such a blade, you have a sharpening service modify a regular blade for you to the angle you want.
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