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hippy
@BetterShifting.Terry
BAM! Hi! I'm in a meeting, but here is a quick reply :)
The AD305 is just a 'dumb' port converter, it won't make 11-speed derailleurs work with 12-speed shifters, unfortunately.
There is a 12-speed MTB Di2 rear derailleur, but it's e-bike only. It doesn't have the wireless or junction A functionality like the other 12-speed di2 derailleurs do... unfortunately.