When did this show up? Why do some mechanical 6800 braze-on front derailleurs have it, and some don't?
You have no idea how right you are... I was helping a friend who'd never installed a derailleur before. He's new to wrenching (not riding) but learning fast. I've been building bikes for 40+ years so, why would I have to read a manual for a simple derailleur install. HE pointed out that screw... 'cause he'd read the manual. Yep. RTFM.RTFM. And you can only see/adjust it in the small ring position.