That is an awesome bike. I lust after those fenders. I have a '71 with the eyelets that needs a repaint. If I ever found a pair I would just paint the bike to match.

I wouldn't worry too much about the fender line. Many of the pictures I have seen of Cinellis with fenders have had small fitting issues. If they were just mass produced then a pair was pulled out of a pile to be painted with a frame they will all just fit ok. That is just my theory.