I have a 20 ft. cat with wingmast ....and with more weather helm;
The issue is if moving the draft forward then reduces also the weather helm for the fact that moves also the CE forward.
The short answer is "yes" the CE will move forward, but by a shorter distance than that of the draft movement.
The difference is due to the jib, obviously, and due to more complex aerodynamic reasons that I will leave for someone more qualified to explain.
I would only move the draft to move the CE if the sail would also perform better after the change. Otherwise, just change the mast and/or rudder trim, as already suggested.
