Martin,
Yes you need to angle the beams up to keep the floats clear of the water.
I had four suits of sails for mine, because I do get a lot of time off when its windy, so I sailed it more in strong winds than light, I used to find if it capsized in a good blow, more often than not it would right it self, it would have drag caused by the rigs, so the floats would blow to leeward and up she would come, they will sail in as much wind as a 1metre, just so long as you aren't overcanvassed. They are very exciting, it amazes me how on the grass or side of the pond they will blow away and self destruct, you struggle to hold them, and once on the water they are so much safer. Allways carry large screwdriver and pin the mast to the ground when they are ashore.
You tend to rake the mast back some to stop the lee float from being driven under the water, when the mast is raked it is suppose to provide some lift. These boats don't seem so affected by weather helm as a monohull, i guess the drag from ther lee float keeps things balanced.