Fred,
My commercial Windem came with insulators at the ends but with a 
jumper connected to about a foot on the long side and somewhat 
shorter on the short side then to two more insulators and antenna 
termination.  The peperwork indicated that this might be beneficial 
to reach a reasonable SWR at the low end of 80 meters.  In my 
situation it was not necessary but FYI.
Pat, K9JAUAt 05:01 AM 8/4/2013, you wrote:
>I think you guys remember me asking for info on the 10 thru 80 meter windom
>antenna a couple of weeks ago and I thought I would bring you up to date on
>my progress.  I purchased the antenna from Radio WAVZ and got it up on my
>tower about 6 PM Friday evening so I haven't had time for lots of testing.
>I had just enough room to put it up without any bends or turns.  The apex
>is up at about 37 feet and the ends up at 10 feet.  I had enough COAX to
>make only a 3 turns choke with adding extra COAX and so far I have had no
>RF.  I can tune allbands with my LDG tuner except 15 meters.  I do not need
>a tuner on the 40 meter band and I didn't try 60 meters as I couldn't
>remember the frequencies.  The highest SWR is on 75 meters and I would like
>to bring it down some if possible.  On 75 meters the SWR is 6.0 and the
>other bands run from 2.0 to just over 3.0.The low end of 75 meters is about
>3.5 SWR.I do not want to make any quick changes as I suspect making any
>changes may change the other bands also.  Band reception has not been very
>good but as best I can tell the antenna seems to receive well. It sure is
>nice to get most of the bands with a single dipole antenna.  I will
>appreciate any suggestions for improvement and especially bringing down the
>SWR on 75 meters.  Thanks much,