Hey! I know cmp 3v is one of the toughest steels for knives, paired with having a good edge retention and not being so bad with rust. But when it comes to sharpening, it may be a bit hard (not as much like D2 for example) with water stones atleast... And I know that m4 isn't as tough like 3v or 4v but it's still pretty damn tough. With having a better edge retention than 3v and 4v, makes it a lovely steel. But does that mean it's harder or takes longer to sharpen than 3v? Probably (correct me if I'm wrong). Then its the same thing for 4v or a bit better, because 4v its in the "middle" of these two. So m4 and 4v are worse with rust than 3v (I don't really give a damn 'bout rust). Having m4 better edge retention than 4v and 4v having more than 3v. But 4v is more tougher than m4, still not as 3v. 3v is the easiest to sharpen then 4v and finally m4 if im not wrong... (sorry for being too repetitive) So I need help with this godly steels without taking rust as a matter. And if you know a steel tough as 3v (or almost) paired with being easier to sharpen without giving up edge retention i would really appreciate it. Thanks yall.