I really hadn't thought of this, it is good for working around trees, but
corners would be a different problem. If blades were at back of unit, it
could back into a corner, but there would still be a small bit to deal with
due to the circular arc of the blades. Think this is going to be a problem
with all blade designs mentioned so far, Unless the blades were exposed,
which I wouldn't want. If necessary, I could live with putting a bush in my
corners so there would be no lawn there to deal with.