Topband: Ground Radial question - Perimeter connections

[Carl Braun]

Hello Topbanders

Another question for the experts...

When installing ground radials on a ground mounted vertical, how critical is it to connect those radials together at the far ends?  Some technical references show the outer tips of the ground radials connected with what they call 'perimeter connections' and I'm wondering if these connections really add value to the ground radial screen.   Has anyone modeled a single vertical or an array with and without these 'perimeter connections' to determine if they are worth the time and effort to install?  Please advise.

Thank you

Carl W9LF