A big upgrade is the new Ultegra Di2 shifter and have both levers shift the rear derailleur, least that what I have planned
Could do that on the 6870 as well.
Yeah, I just really like the shape of the newer R8070 that doesn't scream Di2.
@Chak started
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A big upgrade is the new Ultegra Di2 shifter and have both levers shift the rear derailleur, least that what I have planned