My feeling is the .05 aperture nipple was for the V.C.V. simply because you want less vacuum to the modulator .

As you mentioned, Mercedes came up with the idea of color coded restrictors to make quick and easy changes but I've not seen any of those in some years .

They also made a multiple arm vacuum spider that has more arms than the usual ones, I sadly lost the part number, it was used to adapt a single nipple vacuum pipe .

The main thing here is to understand what you're doing, then you can fix the problems and after that fine tune it to where you like it .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better