In a bit of a dilemma here. I was planning on installing a set of v-brakes on this bike but just noticed the cable guide for the rear. It curves slightly around the seatpost. Looking at the angle, I'm not sure if a v will work as the tube/noodle will have a kink in the cable before entering it.
brakes by 2cam16, on Flickr
I may just have to go to cantis.