I found that allow the very top of my mainsail to have full draft helps alot. It allows you to quickly lift the luff hull and then drive deep following the spi. If you can keep the luff hull up by making long s-curve then the boat (my boat) feels very balanced. Things like leehelm dissappear and most of time I can just keep a single spi sheet setting while I steer through the gusts and wind direction changes.

I feel that this most come very close in concept and feel to wildthinging a catamaran like the A-cat except you don't nearly sheet as often or accurately.

My boat seems to respond very well to this and I'm still the quickest F16 under spi of my club, the others are just getting back at me by killing me upwind !

I get this setup by releasing alot of downhaul and some mainsheet, when needed I adjust my mast rotation as well.

Wouter