Hi Greg,
Many thx for your example which looks great. For the time period both options could have been used. A kings plank would look great but I cant confirm that these were already in use in the first half of the 18th century, maybe Uwe has some reference on this.
I love the curved planks but I think this will be difficult to realize as this main deck is veneer and veneer is difficult to bend around a horizontal radius as it then will create a bubbled surface.
This is why I selected the joggling into the margin plank. Choices choices choices
.