Two things come to mind:
First, a ground screen does nothing for HF Yagi's (for two reasons)
a - A Yagi has a NULL straight up and straight down
b - The GROUND REFLECTION point is hundreds of feet from the
tower
Second, a ground screen WILL benefit any VERTICALLY polarized antenna on
or around the tower, but may rust out in a few years. My galvanized
electric
fence wire radials were heavily rusted in 3 to 5 years. The ground
reflection
from your quarter wave slopers is likely to be beyond the range of your
screen.
A shunt fed tower for 160M would benefit from the ground screen.
de Tom N4KG
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