I finally found and tested a cheap and totally effective way to solve the stiff daggerboard articulation that I have been bedeviled with since I got my new Phantom 320!!
I applied three coats of carnuba wax (used to polish cars) on both the daggerboard and gasket seal. I applied one coat first and let it harden full before polishing it with a soft cloth. Then I applied two more successive coats in an identical manner and buffed the final coat to a deep luster.
I have taken my board out to sea all day for three full days and the daggerboard still works smoothly and effortlessly as it should. Before the waxing it used to be nearly impossible to deploy and retract.