Like most technical things there is nothing wrong with the use of items
such as EZNEC
within the limits prescribed by Roy and the coil question is outside the
useable limits
of the EZNEC program.

Art,
in EZNEC version 4.08 by using HELIX definition menu in WIRES you can define
real coil, with segments. I did that at the beginning of this thread using 10m
quarter wave loaded antenna showing the difference in the current at the coil
ends and also what happens when you move the coil from 1/2 to 3/4 way up from
the feed point. That correlates close to modeling of loading inductance by
using stub and what was found by measurements in reality.
If one insists in modeling loading coil as inductance with zero physical size,
then you get W8JI results (same current at the ends)
There is a progress, even if some still can't swallow it.

73 Yuri, K3BU.us