I've installed a dynamo light onto the fork crown brake bolt, on a bike that has canti brakes, and the light mount and the canti triangle yoke get in the way of each other. These are old style 1990 cantis with a full traverse cable, not the slightly newer ones where the main cable runs all the way to one side.
If I move the yoke down towards the wheel, and then shorten the traverse cable to compensate, will I severely impact the braking performance? I tried reading the Sheldon Brown article but I couldn't make sense of it as it gets very technical and goes through all the variations. Am I increasing mechanical advantage or decreasing it? Is increased mechanical advantage a good thing or a bad thing? (I think it goes opposite of what you'd think.)
I've already removed the fender as that left no room for manipulating the cable. It was cracked anyway. I've taken the bike in the rain maybe 5 times in the 2 years I've had them on. I'll just avoid the rain.
I also need to replace the main cable as it is frayed at the yoke from being adjusted all these years before I ended up with this bike, although the housing looks to be relatively new.