Topband: Tower-attached guy wires - max length for driven tower?

[Brian Machesney]

I'm putting up 80 ft of Rohn 25G with various antennas on top and may decide
to drive it as a monopole on 80 and/or 160 at some time in the future. Since
stubs of wire attached to a radiator can affect its behavior, is there a
recommendation as to the maximum length of the guy wires whose ends are
attached to the tower? While the most conservative method might be to use an
insulating guy material for this length, I would like to use the 1/4" EHS I
have on hand instead.

Thanks,

Brian K1LI