After bending the derailleur hanger on my 2007 F4 back to shape a couple of times, I ordered a replacement (made by Wheels Manufacturing). After installing it, when I put the derailleur back on, it didn't seem to sit as close as with the previous hanger. I now can't get the derailleur adjusted properly to save my life and I'm pretty certain it's a result of the hanger. Has anyone had problems with these? Any tricks? Am I missing something? Thanks for any help.