FWIW, the 1903 Berlin Dagor (9.5") that I recently bought seems plenty sharp to me, but I am only using it on my Speed Graphic. The lens definitely covers 8x10, and on 4x5 it's sweet all the way.

Today I just tried out a used Polaroid 545 holder on my SG using Type 54 (iso 100) Polaroid sheet film, and even at f16 (my Dagor is the f6.8 version) still shows excellent detail. At f32 it's superbly sharp corner to corner. Since I plan to use this lens mostly for portraits, it's exactly what I wanted -- nice character yet really sharp if desired.

I have absolutely no criticisms of this lens, and considering I paid $140 for it already mounted on a custom lenscone and Graphic board, it is my buy of the year.