I built a fleetscale Bismarck using fleetscale plans but found them exceedingly difficult to see any real detail.
So I supplemented them with a Bismarck card model book by GPM, different scale, but bags of detail, also you can get a print shop to print out/copy from the book at the right scale, paste down onto plastic card and have very useful three dimensional parts.
The card model comes out at 125cms long, so fairly big anyway. Ebay the book when you have finished.
Colin