Nils,
you guys keep me working.
Looking for "strip planking" (of course I had no idea what it is) I now found letter to the journal "Watercraft", saying that strip planking is "Time consuming and hard to repair"

. Anyway, I think it's beyond my capabilities and time. Thanks for the insight concerning plywood.
Slowly but steadily, I start to think about throwing the cat away and buying a sailboat with everything on it

before I spend more nights on the PC and days with planer
and sander