We have a new tandem with rohloff hub. Like the rohloff very much for tandem, but the large hub causes high spoke angles at nipples and so spoke breakage at nipples. Rims zac19/36 hole/26". We tour long distance, team+gear-bike=420 lbs, 3000 miles on bike. I have read much and working with maker and wheel builder to fix. I am interested to know if others have experienced spoke breakage at nipples with rohloff. If so, what was your fix. Thanks in advance for your info.