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Asymmetrical edge on M4: How to fix? (4 replies)

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I have a used Gayle Bradley Air, the blade has a very asymmetrical edge: the two bevels are (in medium) 0.5 mm different, left is about 1.1 mm and right is 1.6 mm.

I obviously need to reprofile it. I'm not a great sharpener at all, and never replifiled! but I have to do it and it would be a great way to learn, indeed, I think.
I have only a Sharpmaker, (Diamond stones will be here in 2 or 3 days, luckily) and a Fallkniven DC3 (like DC4 but a little smaller) with the Diamond side also.

I have also a Lansky guided system, but without Diamond stone, so I haven't mentioned it and really I do not use it. Maybe I could try it with the extra coarse stone?

Which angle do you suggest? Maybe 17° each with Lansky and then 15° each with the Sharpmaker?
Could work ?

Otherwise with only the Sharpmaker, Diamond first I think, but 30 or 40 ° ?

My question is. HOW TO PROCEED, with only my instruments trying to fix this little beauty with my hands?
Steel is M4.

Here are also the images of the two sides





Thanks a lot for helping me to improve my skill

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