Originally Posted by oneclick
In re: filing the Mafac under-the-brake-post washers -
Don't.
They are thin enough anyway that with time they will crack and break.
Then you don't have brakes anymore.
If you *must* angle the pads that way look for the CLB washers, they are thicker and have the scallops already.
For only the most extreme of MAFAC fiddlers: The omnipresent jungle website has some washers that are a very close match to mess with, without potentially ruining the stock washers. There is a thread somewhere here on BF if anyone is interested. It’s been a while, but as I recall I needed to give them a slight ream to open up the ID, score with a gunsmith file, then open up the brake post groove with the rattail.
Anyway, getting off topic. The Kool Stop thin lines or four dot replacement pads work fine. The latter being more prone to squeal, in my experience.