That is pretty good Harald, even on your plank size choices, they look the same size as the planks per scale, that I seen at that big naval base out in Bremerton Wa., where they told me they contracted the the wood suppliers to cut big planks like that from time to time, as the old ones wore out, or rotted, or taken in shipment.
That is all they use them for, is blocking, and bracing and he told me they had to be special ordered cause of their size, and hard to get, cause they are the size of a normal tree they cut down for lumber, but I guess some of the trees are bigger, but I think they just about stopped the cutting of the biggest red woods, I don't know for sure, but instead of many 2x4's or 2x6's, or2x 12's, they get one plank like you got.
See they got to stop all their normal operation to comply on getting them big planks, cause they are set up to cut them into smaller boards, so they got to plan ahead, and they cost a lot more for the navy department according to him.
He said they used to build ships there during WWII
Kerry