We are just starting to get into kite fishing as well.
So far this is what I have learned:
The kite is deadly when the tuna are shy, later in the season, but during the early run, you are better off running witches on wind-ons WTFB. The Charter Boats here (Charleston) don't really start running the kites until May or so.
That being said, here is a link for the kites used by "Ali L", one of the more successful kite boats in these parts.
http://www.wind-toys-online.com/inde...=983&parent=86
They run the Powersled 14, but any Parafoil kite will do from what I have learned. Parafoils have a huge amount of lift, which is needed to keep 3 large baits skipping and jumping 100yds behind the boat.
Use Yummee flying fish or plastic squid as baits. Use a fang or a treble hooks as a stinger at the tail of the flyer (usually attached with copper wire or a rubber band). This eliminates alot of the misses by the fish.
Your main hook will be large(12/0 is not too big), rigged point up (like you would a grub) back through the body of the Yummee. Most of the hook will be burried in the body of the flyer, which is why you need such a big hook.
Leader can be as heavy as you like, because the bait will not be in the water and the tuna will never see it.
The bait should be in the air more than in the water. When it is in the water, it should skitter across the surface, not drag underwater.
You catch the bigger YFTs on the kite baits.
You will have some hellacious bites on the kite.
Anyone with more knowledge, please post. I am a sponge at this point...