One of my friends has a bike I was considering to buy. I'm not sure of the year but its an older Novara Randonee, lugged steel touring bike. I of course, would swap out, polish out a few parts but one thing that makes me hesitant to puchase the bike is the Top-mount Downtube shifters. Striped down this would make a pretty neat single speed CX I would imagine but what if i wanted to leave it geared, would this part be hard to replace/upgrade? YAY or NAY?