Want to share your experiences with a particular kite? This is the place to do it, but please... No inflammatory remarks (flaming), keep it fair and try to preface all reviews with the fact that you are merely relating your experiences.
You can also use shorter sticks without the rigging lines for balance change and kickstand purposes only, without the stiffening effect on the frame, which can be mounted lower on the uprights to change the balance.
Yes, the Shook's sell kits for them. Everything you need to install is included, even detailed plans on installing. It is pretty straight forward - introduce no bend to the existing kite frame. A bit harder to do when making your own from scratch, which many people chose. But the overall thought, is not to introduce any bending of the frame. The sticks should end up as a "neutral" add on.
They do seem to be an East Coast flavor. At WSIKF in August, when folks from all parts of the US and world, get together, you'll mostly find them on kites from back East. Just seems to have caught on there. Like I said, it's a different feel type thing. Some love them, some don't, your choice. I use a set on my Zen for specific reasons - to limit the flex in my LE. Same with my SUL. Some like the kick stand effect. Some like the balance change, adding them creates.
Several of the newer designs are using them built right in - Lam Hoac with his ABS and the 4WD from Europe, are several examples.