Originally Posted by
WizardOfBoz
If I'm not mistaken, that screw is to brace the whole assembly to make the mechanical coupling from the FD to the seat tube stiffer.
Mine too.... instruction on my 5800 105 Front derailler (braze on and bike has braze on mount) were to adjust the derailler than put a supplied little metal piece on the frame and make the set screw touch the frame..... not to be used as and adjuster
I would have just gotten a banded derailler rather than use an adapter
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Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)