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Hills are irrelevant with a Rohloff, that low gear is very low.
With a Rohloff, you pick your preferred gear inches for your average cadence cruising gear. That becomes the direct drive gear 11. You then have 3 steps up, and 10 steps down. You get to go reasonably fast (as fast as you need to), but have this huge array of gears for any terrain that you could ever face. The gearing is ridiculous, gear 4 is a comfortable spin up Highgate Hill West (not fast admittedly, but it won't knacker you at all... you could do it for a hell of a lot longer).
So the position changes I'd want are for 10 miles here, 20 miles there. It's for the numb wrists that come from spending hours in one position.
Bar ends don't work well here, but with drop bars you'd spend time on the hoods, time on the flats, and small bits of time in the drops.
I have got the ergo grips on it, and they help. But drop bars would be better.
Velocio
@sohi
You could get some short bar ends to change the angle of your wrist.
Makes a massive difference uphill too.