Since I have Campagnolo 10 speed shifters, can I use any Campagnolo front? Basically I am wondering about chain rub with the 11-34 cassette and a 9 speed chain. Never having used ergo style shifters and what cage adjustment possibilities there are. And to add to this, I seem to remember reading that older 8 speed Dura Ace 7400 type are a bit better because of the wider cage.