Karel, you might not want to put in ALL of the screw/plugs in the deck. It might look too busy if you did that, especially with them being a bit oversized.
The way that you have it now, with only a few rows of screw/plugs gives the proper impression.
The reason I say that is that in real life, there would be a screw/plug each time a plank crosses a beam or support under the deck. Those beams are spaced about every 5 mm, (don't have my micrometer with me right now so the measurement is just an example) the same as the ribs.
Every time a plank ends (butt joints or when it's interrupted by a hatch or other deck fitting) there would be two screw/plugs, side by side. Butt joints were always staggered. There were never two together with adjacent planks.
Planks were usually a maximum of 6 meters in length - or shorter if there was a hatch or other fitting in the way.
So if you put in every screw/plug, you will probably have a little more than 4 times the number of plugs you've already done and it might start looking too cluttered with the oversized pins.