I am installing a C-Record Chorus rear derailleur (B position) to try out the Syncro shifter for this model; I'm thinking it should shift better due to it being a slant parallelogram. The first thing I noticed is due to it being a drop parallelogram it needs a rear loop rather than the short SS coil housing. Since I used white housings for the brakes, I wanted to use it for the derailleur loop, but it is brake cable. I know that derailleur specific housing appeared long after derailleurs were in use, but I'm still wondering if some derailleur specific housing would make any difference?

Below is the derailleur in the A position before I switched it for a Super Record several years ago.