Was it light, medium or heavy breeze?
Sounds like it was on the light side. I assume that your main was traveled all the way out and the boom past the corner casting. Jib should be out too, maybe 20 inches between the blocks and the cleat, but roughly parallel to the main. Weight all the way forward. One rudder up if your rudders work well enough to be sure it locks back down.
After that its a matter of not moving the rudder too much and steering low. 90 degrees on the bridle vane. If there are any waves go lower when they are pushing you.
You need to go as low as the boats behind you or you'll loose them. Rig tension tight pulls the mast forward so it should help you downwind unless you are raked more than your competition. I would just work on your downwind. It's harder to get than the upwind.
cheers
Bill