Hello saibura. are you still looking at this? I have two things to add, I am not sure what you mean by 2nd gen C Rec rd. if I recall correctly there was only one and it was not a slant parrallelagram design. although they tried to make it work (as all the derailuers) with Synchro it never really did. if you can find 8spd Campi DT shifters get me a pair too!!
Bob is your Chorus the one with the parrallelogram that can be swtiched from A to B? after I gave up Synchro I never had much luck with those for anything but retrofriction.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk