Mafacs mounted on studs squeel much less than the same Mafacs mounted on a standard Mafac aluminum bridge.
They regulate and stop quite nicely as well, especially if using modern brake pads.
I make these studs ... for sale at $50/set of 4 shipped.
Photos at http://www.flickr.com/
I also make Weinmann/Dia-Compe studs (but haven't tested them yet).
Amir Avitzur
Ramat-Gan, Israel