Since this thread has drifted to hub toughness, my .02:
I knew a very strong and heavy rider (120/130kg) who did some long tours on hilly country. His load was heavy too. He was excited as he got his new Rohloff, but his gearing wasn't low enough. So he tried a very small chainring, way smaller than recommended by Rohloff. The hub worked flawlessly, but he had problems sometimes with the axle coming out of the dropouts under extreme torque.