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Finally got round to connecting the rear mech up to the PCE1. According to the E-Tube Project software there 'may be a problem' with the rear mech. I think this is something of an understatement. When the PCE1 claims the rear mech is in the right position for the smallest cog on the cassette, it's actually on the third largest. I don't think I can fix that using the trim settings. Anyone got a spare RD-6770 they don't want any more?
Brommers
danb
Might be worth hooking up to the di2 diagnostics whatsit(PCE1)