Thanks for the feedback, John. I imagine that we will end up doing
as you suggested. We WILL test the antenna on the ground with a
temporary mast to see if there are any issues, but we also realize that
things can, and probably will, change when it is permanently mounted on
the building. One of the reasons I am posing these questions here now
is that once the antenna is up, it will be difficult to get the
building personnel ( its a firehouse ) to lower the mast for changes.
Its a rigid one piece aluminum mast that will be bolted at its base to
the building.
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Suggest you fit a pulley at the top of the mast such you can lower and
subsequently change the antenna using a halyard.

Frank GM0CSZ / KN6WH