Very interesting, I have a Komura T400 which, when used carefully, is quite sharp but not razor sharp. It really stretches the front capability of my Shen Hao camera, which could be a contributing factor to its apparent lack of super sharpness. I used it for some super close-up portraits on my Toyo 45G monorail, they were excellent.
I too have a Schneider Kreuznach 250 f/5.6 Tele Arton Linhof unit. Used it for years, even had the shutter repaired as it was a bit dodgy; if only it had more coverage I would still be using it; well, using it more than I do anyway. I've replaced it with a Fujinon 250 f/6.3 which I have taken too with gusto.
Been thinking of moving the Tele Arton on, must do something about that next year.