I just picked up some Dura-Ace 9-speed bar end shifters and have a 9-speed 105 rear derailleur I plan on using on my Surly Long Haul Trucker build. Now the DA shifters have a little sticker on them that says "Compatible with RD-7700(9s) & RD-7400(8s)". I assume these will also work with my RD-5501 105 derailleur, but now am having doubts. It's just like Shimano to obfuscate like this. WIll this combination work?