I have the RS handlebas and found two problems. My early version of this handlebar has a double cable groove, but no cable guide under the tops. If you don't tape the tops (to show the nice carbon weave), the cables dangle from beneath the drops. The bigger problem for me is that the bar ends (where the hoods sit) are about 5mm lower than the center (where the stem clamps) which resulted in an overall lower drop than I wanted. Since my steerer tube is cut, I cannot add any more spacers to raise these bars back to original height. Flipping the stem resulted in too much rise. So, if anyone wants a once-mounted, but not ridden RS handlebar in a 42 width, PM me.