The other major advantage is the ability for the board to 'kick back' should one run aground, and this can be a very useful safety feature in shallower waters. Board is a higher aspect foil, and little deeper than the standard daggerboard, so it will be slightly more effective. This will make up for the extra slot drag associated with a centerboard case, and overall performance should be about the same.
Centerboard is now an option for both F-32A and F-32AX (F-32AX shown), with full construction drawings currently in process, and these will be ready by the end of July. More detailed study prints are now available for down load from the Farrier Marine Study Site
Note that 'kick up' centerboards are more complicated than a daggerboard, so will take longer to build, and the extra complexity may also mean more maintenance being required. However, having used such offset centerboards for all the original Trailertri designs, and the F-82, F-36 and F-39, the configuration used has been very well developed and tested. Follow the plans and it should be virtually trouble free.