Hey guys! I have a 1984 Peugeot PSV10N which came with a bolt-on Simplex front derailleur...that is, there is actually a threaded fitting on the right side of the seat tube that the derailleur mounts to, instead of a standard braze-on tab or space for a clamp-on (see pics). My problem is that I want to replace this derailleur with a braze-on Campy FD by way of a clamp-on adapter, but the fitting has a little raised piece which I can't work around (again, see pics). I have been thinking about using a dremel to smooth it down so that I could use the braze-on with the adapter, or maybe even some kind of file. If I were careful and removed as little from the frame as possible, would this have any effect on the structural integrity of the frame? Any help would be really appreciated!
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The fitting...
The Simplex FD...
The Simplex mounting plate next to the fitting...
The new clamp-on adapter I want to put on...
