OK so I'm building up a new bike with internal cable routing. I have fittings to guide a full-length cable housing. Alternatively I can buy internal cable stops so the housing would be about the same lengths as usual except that the bare cables will be inside the down tube. They're pretty pricey though for a cheapskate like me ($11 each and I'll need four). Would shift quality improvement be significant with the internal cable stops versus full-length housing? $44 worth? The rest of the bits are Dura-Ace barcons and Ultegra derailleurs, Dura-Ace cassette, KMC chain. The barcons will be at the end of aerobars so if I go full-length housing that'll be a long stretch of housing.