ok I will be the ignorant one and ask, why does the high aspect need to come up and not the low aspect?
The current theory as empahaized by Greg at his talk in Zandvoort is:
Leave them alone unless you have to. This goes for either style.
With the spin you are trying to generate as much apparent wind as possible. The boards only help with this.
If the wind strength is such though that you can not keep the hull down and the boat is not accelerating you can raise them a little to try and raise the center of resistance and let the boat settle down. Messing around with them trying to lower wetted surface is a waste of time and the extra steps will loose you more ground than you can make up in all likelyhood.
