On Aug 7, 9:27 am, wrote:
Is tensioning even necesary in this situation? Maybe just rounding the
corners would work.

You've got to tension it somehow or it will look like crap and
wouldn't keep out a retarded tumbleweed.

On the corners, you need a total of 5 t-posts to do the "widget"
thing. One in the corner, one about 4' from the corner in each
direction to brace against, and one to run at an angle from the bottom
of the brace post to the top of the corner post. You can use shorter
posts for the brace posts.

Once you construct this structure, you can get a special tool that
hooks the wire, or you can make your own with a 4' 2x4 and a few heavy
hooks screwed into the edge. It doesn't need to be so tight that you
can play a tune; a reasonably strong person can put enough tension on
the fence by pulling on the 2x4.

Tension the fence as you go along, at every transition from flat to a
hill, or a hill back to flat. Again, just tight, not so much that you
can play a chord by dragging your hammer across the wires. You may
want longer posts at the transitions so you can drive them into the
ground farther to prevent pull-out.