Good point about the Mafac centre-pull cables - countless competition pros used these for many years on the famous Racer series brakes. As soon as I saw them it seemed a blindingly obvious way to provide adjustment.
Originally Posted by
fietsbob
Heine is a high end guy selling to well off people.. the center pull transverse cable has 2 cast zinc barrel ends
[Mafac has one barrel end and the other end a pinch bolt, to use a cut off gear cable.... that is what they copied; left end of your 'compass' picture]
full DIY? the end of the cable is frayed to grip within the zinc cast around it..
can you make a foundry in your shop, to melt and pour zinc?
Other workarounds involve set screws in a piece with a hole in, & across it.. to grip the cable, made by threading and drilling..
....