From everything I've heard, it should be fine. I actually have a 6800 braze-on FD available for sale:
http://www.bikeforums.net/road-bike-...leurs-new.html
__________________
"The older you do get, the more rules they're gonna try to get you to follow. You just gotta keep livin', man, L-I-V-I-N." - Wooderson
'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur