I sharpened my 2nd new 'v' chisel today, and I had problems both times setting the correct angles. This led to wasting some length on both tools, not a lot, but enough to be frustrating. I used the angle finder in the way shown in the handbook, i.e.; by laying the angle finder ear into the bottom of the 'v' in the chisel, but it is hard to see if it is resting evenly there.a Both times I came up with wrong angles and had trial and error it to get the correct bevel, 20 deg. in this case. I'm not sure if it is failing eyesight or something else. Can anyone give me some advice on a way which works well for them?