I don,t know how to post video,s but here is a link to the rigging guide/ideas behind the sail explained by Kauli and Jeffrey Henderson
I use to ride for Hotsails for a long time, but have been for 1.5years on custom sails trying some different stuff and ideas.
Ive been asked/invited to ride for them again and could try various sails including the 4.9 KS3 (pre production so without all the nice details of Dunks sail)where
I was a bit sceptic about because where I sail you plane or drift away with the current and walk for miles.
No reefbreaks, and slog n ride conditions...think about the world cup in Sylt, thats like the crap I,m sailing in, sandbars, lots of current, often side-on but seldom side-off, but hey its home, and every holiday we make to better spot are seldom a disapointent due our low standards :)
Like Dunk wrote: first time you rig it, it looks wrong, but when you just try it it all make sense.
I,m 87kg and expected from a 3 batten sail something agile with little or no drive and a lazy planer.
Wrong! It has a lot of pull, accelerates very quick and fast and to my big suprise...is very stable.
Some sails have a strong pull but the extra pull doesnt materialize in more speed, this one keep accelerating while it gives really fast feed back.
The lack of battens make the response time of the sail feel faster and in a way it makes the sail something between direct and nervous, but in a controllable challenging manner.
On a wave (side-on headhigh) it has heaps of drive but it dissapears in the topturn.
I,m a bit of a lazy waverider with shifying my hands back and forth on the boom and with most sails when you make a topturn in side-on with your hands still wide you get that pull, with this sail you won,t. It just datys very managable, until you steer to the bottom and the sail accelerates.
this combi of speed and drive allows me to sail for me completely new lines on the waves. It reminds me to the sensational feel when coming from an single and switching to the multifins a couple of years ago. When I switched from the rather heavy Fires to my superlight custom sails I had a sort of experience, but that was more common, with this the difference is way more sensational and I liked it so much that I ordered a 5.2-4.6 and 4.0 where I expected to go for a mixxed quiver of Firelights and QU4Ds,s.
As bigger sails I have a Firelight 6.0 and the 5.3. The Firelight are for me must haves because I helped to develop the them just before I switched :)