I've picked up an old Colnago superissimo, similar to the one here: Steel Vintage Bikes - Colnago Superissimo Classic Bicycle
Brakes are Modolo super prestige's:
I won't be using it for racing so I'd like to fit some top bar brake levers; I've been thinking about interrupters, but my understanding is that they move the brake cable housing, rather than the cable - so will they will work with my frame, where the brake cables are inside the tube of the frame?
If they won't, I'm thinking of ditching the dropbar brake levers and installing some normal top bar levers, but I can't seem to find any that will fit a 23.4mm bar (the stem area on my handlebar is 25.4). Is this a normal thing to do?