Hi Kingcowie
Basically its flying a hull downwind, common practice in the A Class, Taipan Sloops can do it, Cat Rigged Taipans not really, however when the new mainsail, it should be easier to get a hull up.
You gybe downwind using angles rather than running straight down.
I've seen something written up about it somewhere, I'll have a look later and see what I can find.
Regards