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I've bought a second hand road bike with pro stealth evo bars and dura ace Di2. There is internal routing in the bars which the brakes are through but the wires for the Di2 aren't. I think it looks a bit messy plus with the bar tape not covering it means you can feel the wires on your fingers when your hands are on the bars. Does anyone know if this is normal because the Di2 connectors don't fit through the internal routing? Does it look like it could be done better or am I being a bit too pedantic?![IMG] 
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There should be room for internal routing of the Di2 cables. Have you checked or was that just the way they came?
Edit... You may need to thread the Di2 cables through first then the gear cables. Guess you might be struggling to fit the connectors through if the brake cables are already in place.
Yeah it's just the way it came unfortunately. I think for ease I'll just need to put some electrical tape around the wires to keep the gear one on the brake one and see how it goes for now.