Once again very little progress during the past week, but I'm actually quite happy about that because it was caused by a long weekend visit by 3 of my most favourite girls, my daughter and my 2 little granddaughters (their father is also a navy officer and away for weeks). It gives me so much more than any hobby can do.
Anyway, I've got all the deck clamps installed and have slowly started on the inner planking. Since I did not hear a lot of pros and cons for which side to leave open I opted to have the port side open (due to the minor obstruction of the lifeboat).
I'm taking a different approach to other before me and starting with the top section (1R) trying to see if by doing it that way could exclude the need of stealers - and it does! The intricate shapes of the planks does actually fit together without using any stealers and no excessive sanding other than barely removing the laser char. Moreover the lowest part of this section almost hit the pencil marks I had initially made for the top of plank 12 of section 1P

The top plank from section 1P is only dry fit.
The color is just a tiny bit of water put on with my finger to spot residual glue.
The pencil mark on the port side was an attempt to mark the locations of the 2 lower deck. As Uwe said, these marks can of course not be made when the inner planking is in place but I'm thinking they can be transferred to the inner planks when the planking is approaching the marks, using e.g. a compass or a piece of 10 mm wide plank to displace the marks with 10 mm and then shift them back the 10 mm in the opposite direction once the planking is finished (just mentioning this for the sake of others, for me it is too late to do it that way, I have to mirror the marks from the port side to the starboard site)
I'm thinking about leaving out plank 12 (maybe also 11) in section 1Q (port side) to get a bigger "window" to view the interior from the outside. What do you guys think? Bad or good idea?