Wheel arrived back yesterday. Wow. It took 2 weeks to get to Rohloff. One day for Rohloff to do their magic, and 4 days to return. (I can't figure out how Australia Post works.) I didn't waste any time putting it on and going for a spin. With 75kg load - no problems. Didn't have a 120kg load handy to try with that, but I'm confident that its sorted.
Going to hang for a few more days. Promised to fix a laptop and am now waiting on a hard disk to arrive. It should arrive Monday (fingers crossed) so that I can leave here by the end of the week.