I am planning to deviate from the plans and plank the main deck using more realistic scaled lengths of plank (as I did the lower gun deck). This requires fitting a false deck on top of which I can do the planking.
I still need to figure out how the deck planks would have been fitted around the various openings and also whether the 'king plank' was the central plank or fitted on either side of one of the openings on this generation ship. My understanding is that the 'king plank' was a thicker, wider plank used in deck construction to provide structural strength. I am also going to attempt to 'joggle' the deck planks into the edge plank as opposed to just running off the edge beneath the inner hull planks.
On the lower gun deck I used 0.6mm veneer strips between planks to simulate the caulking. I read somewhere this morning that someone used dark wood filler successfully - I want to experiment with that as it would definitely be quicker that way - need to figure out whether it would not dry out over time.