The problem that I have found with modern Shimano brakes is that they have the same length screw for both front and back; the extra length for the front comes from a longer bolt, which will not fit inside the frame hole. I suppose I could try to go with another caliper brand, although I have already bought a Shimano. What kind of calipers did you put on your Moto rvdaddy? In answer to triplebutted's question, I really just don't want the extra weight, the unsighlyness and the hassle of working with a centerpull. They're terrible to set up adjust and they, in my experience, are not nearly as reliable.