Originally Posted by
fietsbob
By Definition If its brazed on its location is fixed ... But .. the FD can be Rotated a bit in the mount ..
with wedges between the mount and the part of the derailleur that clamps in the mount.
Bring the Tail end of the cage Up or Down..
Braze on mounts have a vertical slot that allows the derailleur to be moved up and down to suit chainring size. There is no need for wedges to move the tail of the derailleur up and down, you loosen the bolt that attaches the derailleur to the mount and slide it up or down to the correct height. The mount has a curved channel that allows the derailleur to be pivoted a few degrees so that the cage can be lined up with the chainring