While I am going to agree with the above in terms of a cradle to grave system to get to a sharp print, I will say that out of 7 modern plasmat LF lenses that I own, my 135 Apo Sironar N has a noticeable amount more "Bite" to it over all the other lenses, some more than others.

That is not to say that prints from my Grandagons, Apo Symmars and Fujinon A are not sharp, just that a good print from the Apo Sironar requires Kevlar gloves to handle it...;-)