Hi, have you tried using the steps? You can set the step
size so every time you press the arrow it moves only by
the step size. So you can jog till about 5mm from the edge
and then use the steps to get the finder to touch.
The step buttons are the square dots on the screen next
to the arrows. I found that the standard screen layout is
not practical as you can easily press an arrow if you are
not careful. So I am using a touch screen and I have
re-designed the layout so the step buttons are now 4
separate large buttons away from the arrows. This works
well as I can press them while looking at the edge finder
without worrying about pressing an arrow by accident.
I have not checked but I am sure there are keyboard
buttons for stepping too.