BuellBill - the kit is just one part - a nicely-machined, alum block that is the lower shock eye. On bikes with progressive linkage suspension, merely changing what they call the "dogbones" will change the seat height and it can all be done from the outside but not so on the NT.
The NTs shock has to be removed from the bike and disassembled (spring removed) to get at the shock eye which means you'll need some sort of spring compressor. By coincidence I did that very task a few weeks ago when my Works Performance shock badly needed a rebuilt so I called Works in CA and was told by the shop guy that they were 3-months behind on their jobs! I brought the original Showa shock (30k miles) down from the attic, removed the standard shock eye and installed the HyperPro part, along with a softer Ohlins spring. If you lower the bike, you'll also have to
shorten the sidestand and that is not an option!
Here is the Honda's original shock with the HyperPro eye installed + Ohlins spring (approx $100). In the foreground is the original shock eye. They only differ by around 3/8" of an inch but because of the leverage ratio, it results in a 1-3/8" (35 mm) drop in seat height. I'm 5'6" and the original 31.7" seat height was impossible for me!
Here is the shortened sidestand and you can compare it to your standard sidestand. While at it I made a 3/8" steel disc for the foot because I didn't see any point in reinstalled the Honda ballet slipper! Now, I can park on a dirt shoulder without worrying about it sinking in.
In 2012 when I lowered my bike via this method, I made a spring compressor for that task and you can borrow it for no cost and just pay for my shipping cost which is less than $10 and return it to me once done. That spring compressor has been all over the country so it's helped to lower around a dozen bikes? If you need more info, just send me a PM.