Given that I don't want to buy two XTR Di2 mechs I shall go long, as they say.
Long cages Ultegra Merc with longer cage, smaller upper jockery wheel and Wolftooth derailleur hanger extension.
Still pointless it was way too low on a 7kg bike.
@edscoble started
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Given that I don't want to buy two XTR Di2 mechs I shall go long, as they say.