Calnago wrote:With the Shimano band type derailleur, the support screw or backing plate are not required. The band itself provides the necessary support. The backing plate is for brazeon type installations, and may or may not be required depending on the specific frame and how stiff its brazeon is or isn't, and whether if used the support screw can butt against the brazeon plate itself. I'm assuming you're using the Shimano 9000 band type front derailleur and not a third party brazeon clamp with a shimano brazeon front derailleur.
My bad. Sorry about that guys. Haven't played with the band mount DA9000 FD only braze on.
That's right...OP's bike is a '08 Madone. Sorry for the derailment...pun...ducks.