Sharpening help

Unfortunately, my experience with M390 (benchmade) has been very poor from a user standpoint.

I go by Vanadium %, if it's over 4% I usually use my diamond plate.

Luckily I have not owned a benchmade in 12-13 years. I have spyderco, lion steel and two customs in m390 and I enjoy it. I guess 4% vanadium and 1% tungsten would qualify. Russ
 
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