I spent a good while sharpening my LV BU Jack Plane. I tested the edge with my thumb nail several times and it never seemed sharp enough. I pulled out my 45d shooting board, chopped a 45 on a piece of red oak and took a swipe. A curl of wood as long and as wide as the 45 peeled from the oak.
It seems I never feel an iron is sharp enough. I have to remember the enemy of damn good is just a little bit better.