For those choosing to make their PT Eleven with the sailing option, we created a watertight cap for the dagger board trunk.
We chose G10 - Garolite in order to have a strong and stiff cap that would be as thin as possible (1/8th inch) so we could keep the profile very low and still be water tight. The dagger board trunk opening is close to the seat and the rower would actually sit over it with 2 people in the boat. Also, having a good lid is important if you would want to tow the boat.
The optional kit consists of a machined G10 Garolite cap with gasket groove & stiffener groove, gasket, mahogany stiffener, machined Garolite spacers, plastic washer, plastic tether washer, tether string, turn-dogs, and fasteners.
Below you can see the cap installed.
When sailing with the dagger board down, the turn-dogs also serve to keep the board down by resistance on the aft end and looping the string over the forward one.