Nut Fixed Brakes is what I had on my AlAn but they were <C> single pivots .

a counterbore on inside face is going to be hard to do on a finished frame
You don't want to drill it out all the way through ..

since Italian thread is right hand, on the BB drive side you have to make sure its tight..

if it were left hand thread , like british/near universal standard, that would be less of an issue..




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