I have a MK II jig that for the life of me, I can not get it to sharpen a square edge with out a bunch of fiddling. I've checked the angle registration jig to make sure that it is perpendicular to the sharpening jig and it checks out perfect. Then before I start sharpening I check to make sure the actual roller jig is sqaure to the chisel or blade. Then I start to sharpen. I place a hand on each side of the jig so I don't believe that I am applying uneven pressure. Even if I was, with this jig I think it would have to be pretty substantial pressure to end up with a blade at a skew. After a few strokes, I look at the chisel and only one side will show signs of hitting the stone or sand paper. If I were to continue the business end of the chisel ends up out of square with the sides. I initially thought that maybe it was my stones, but I keep them flattened on my granite slab. I also still have the problem if I'm using sandpaper on float glass. Is there something that I am really screwing up that I am over looking?? It's really starting to make feel dumb not being able to get a simple jig like this to work.