I figured out that there is a little screw that locks the front derailur cable into place on my campy victory corsa front derailur that is stripped. This is why my front derailur was not working right. Do you think I should try and either somehow or another try to fix this by either rethreading the screw hole for a larger screw or some other fix or get a new derailur. I have downtube shifters, and it;s a double crank. If new, what kind of front derailur would be compatable?