The product is actually the National Cycle model number N2532 "Fly Screen LS", although the photos on the National Cycle website show it mounted on various cruisers.  As of this writing, they don't list the GT1000 as a bike that will fit this fly screen (or vice versa), so I guess the Custom Sport Classic folks did some experimenting and discovered that it will fit.

Apparently things must have changed quite a bit since the last time I tried to mount an aftermarket windscreen, because this one fits like a gem.  The hardware is a perfect match for the GT1000, the instructions are simple and straightforward and the chrome plating on the brackets is thick, shiny and flawless.

The fly screen comes with all the mounting hardware necessary to fit the GT1000.  It only took me about 20 minutes to install it.  I loosely connected everything together and then unscrewed the bolts on the sides of the GT1000's headlight, fit the screen in place, lined it up and tightened everything down.  It took me much longer to take the photos then to install the screen.

A pair of longer replacement bolts are provided for the Ducati's headlight shell, but I found that the original parts worked fine so I used them instead.  The fly screen can be adjusted back and forth and side to side if necessary, but everything seemed to be lined up perfectly as soon as I assembled it.

The mounting kit includes some "star" lock washers to prevent the fasteners from becoming loose.  The photo above shows a close-up of the mounting assembly.  It's a bit difficult to tell because of the close-up, but in this photo the fly screen is folded down over the front of the headlight, laying horizontally above the front fender.

Also shown are the chrome-plated mounting bracket, the original Ducati headlight shell bolt on the right and the star washers and flat washers from the mounting kit.

The black dome nuts on the back of the fly screen and their horizontal adjustment slots are also visible in the photo above.  I didn't have to adjust anything there and simply tightened the nuts in place, making sure I was careful not to apply too much torque.

The photos below show another close-up of the side mount.  Note that the bigger wavy washer on the left is the Ducati original part; it is not replaced and doesn't have to be moved. 

There's also a view of the side of the headlight with a close-up the chrome-plated vertical mounting bracket.

And the photo above shows the finished product.  I think it looks great, especially with the Oberon Bar End Mirrors!  I purchased the original Ducati accessory windscreen for the GT1000 but it's sitting in the garage in its original box; I like the fly screen much better.

UPDATE:  wBW visitor "R.B." reminded me that I forgot to comment on the performance of the fly screen!  Sorry about that... The answer is that it does block some of the air that would normally hit my chest, but not really enough to notice. 

I can put my hand in back of the screen at chest height and feel the dead air, but the "bubble" of air only extends back about 3/4 of the length of the fuel tank.  The good news is that it doesn't seem to cause any undue turbulence that I can notice through the handlebars and it doesn't affect helmet noise levels.

So I wouldn't say that this particular fly screen is a replacement for a full windscreen, but hey -- it sure looks cool!