G'day Mike
Hmmm..... I wouldn't change the 2nd planking to 1mm, because with the 1mm first planking and then your planking it would make the thickness of the planking 7 inches thick at the scale of 1:90. That's a bit too thick if you ask me. Even using the 0.5mm planks that makes them a bit over 5 inches thick at the scale. This size is livable, but 4 inches would be better, so if you do the 2nd planking with 0.25mm planks it would be ok.
The best solution would do only 1 player of planking with 1mm thickness, but at 1:90 scale that would be very very difficult job. This would make the scale planks to be about 3.5 inches think.
Just a thought
Greg
Thanks Greg, I didn't even think of the scale of the model. I may try cutting up some .25mm planks and see how they turn out. I don't think the kit is very accurate historicaly but your right about it being to thick. I have not found may pics of the ship and only a few build logs to compare things to. I would like to keep it as accurate as possible.