Does anyone else have trouble getting VG10 sharp? I've got a 150 Tanaka petty that i have never really been able to get nearly as sharp as my other knives by a long margin. My sharpening skills are still at a learning beginner stage after all this time but i feel a bit frustrated and now wondering if there is something about this steel that makes it tougher than b1/2 or wh1/2 which most of my other knives are.