I was just sharpening up by BK2 with my lansky sharpener, and was wondering if after sharpening the edge at the 20deg angles if dropping to the 15deg angles to take the shoulders off of the edges would be a good idea. I'm not sure if this would help to "semi" convex it or if it would make it worse by adding essentially two shoulders instead of one bigger one. I realize it's not a real convex, but thought it may make for a slightly better slicer. I like the lansky system to sharpen for its ease of use, and was just wondering if anyone else had tried this and if it made a better slicer or if it would be a waste of time.