I don't know if this is class legal but here is what I've been doing.

I have a long bungie hooked in my center lacing for storage. I hook it on the lacing forward of the tiller crossbar and take a full turn or two around the bar, then stretch it as far forward as it can go and hook it again to the lacing. Now I can lie WAY forward and steer either way by pressing sideways on the bungie with my foot. This works in light air only, of course. It is really nice downwind as the extra turn hold it quite steady and I only need occasional tweaks to hold a steady course. Gives me time to find and open a beer!