Gramp's shop wrote:
Hah! Now all I need to do is figure out how to draw an arc with an
18 foot radius :-) I have a couple of ideas and will post pix of
the process.
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"Just Wondering" wrote:

Two lengths of PVC pipe. Drill a hole in one end, attach a pencil
to the other at 18'. Draw the arc on the ground, spiking the pivot
end in the ground and putting the wood at the pencil end.
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You've obviously never done this.

Lew