[TowerTalk] Square Hole or Round Hole for Self Supporter?

[Richard Thorne <rthorne@rthorne.net>]

I have an HDX-589.  I'm in the planning stages for getting the tower 
installed.
I ran across a driller yesterday that can drill the 10' deep hole to a 
diameter of 7'  (87" to be exact).
We have excellent soil here for self supporting towers, caliche. Digging 
by hand is out and using a back hoe would probably make an over size hole.
Is there a reason not to use a cylinder vs a square hole?

Rich - N5ZC
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