Building up my new Ritchey Road Logic frame. First time I'm building a bike up with Campagnolo componentry ( Athena 11 sp gruppo ). Groupset didn't come with downtube barrel adjusters. Need to purchase some. Do I need a particular kind of adjuster. I see some online labeled as indexed, others not labeled as such. I see some claim Shimano compatibility but nothing labeled Campagnolo compatible. Is there a difference in the size of the shift cables between Shomano and Campy ? Any brand name you suggest for me ? Feedback is greatly appreciated. Thank you.