Topband: Necessity of a Ground Screen under a well radialed vertical

[Doug Mein]

Hello everyone,

I plan to erect my first ever vertical for 160M soon. I plan to install 
120 radials. I have noticed in certain photos of lowband antennas that 
some amateurs have installed a "chicken wire" ground screen immediately 
below the vertical radiator. I have also heard that copper ground 
screens are also used in commercial BCB verticals. With 120 radials, 
does anyone think it is really worthwhile to also install a ground 
screen?? I personally feel this is "overkill" however I would value 
people's opinions on the subject nonetheless. For any "pro screeners" 
out there, what size of a screen do you feel is optimal?

Thanks in advance!

Doug VA3DM near Toronto