Just a reminder. Besides more logical design, the EX box has one great advantage over the open-cable "internal" setup: You can shift it manually even in the absence of cables by undoing the thumbscrew, pulling off the klickbox, and turning the central brass nut with an 8mm spanner to some all-purpose gear that will at least get you to the nearest bike shop or your hotel or home. That is why in toolkit discussions I recommended either
-- the X-Tools 14-tool multitool that has an 8mm socket in unit with a male hex stud, so it fits in the handle the same way as all the other bits in the set. You can see it here (sorry, the only photo I could find)
http://www.bikesweets.com/XTools_14_Bit_MultTool_p/xtools-multi-tool.htm where the second photo shows the 8mm socket on a stalk at the bottom corner on the left. (The thingy in the middle of the bits that looks like it could be a socket is the driver extension unit. The 8mm socket is the shallow one, lower left; you can't see the stalk because it is in its retainer slot.) I bought this whole set, water damaged, from when Chainreactioncycles, who're up the road from me, had a flood, for two euro merely to get this odd 8mm socket, because I had a much more elegant and much lighter multitool already. But all this sturdy kit requires to be suitable for a Rohloff owner's on-bike kit is a good quality T20 Torx bit, which can fit in the space where you've removed a bit that is irrelevant to your bike.
-- or a Draper 8x10mm flat cyclist's brake spanner
-- or a common car 8x10 brake spanner from any motor factor's, ground down flat to save weight
-- or a good quality (it's a nut you really don't want to round off!) 8mm socket plus a 1/4in by 6mm hex bit so you can drive it with your multitool.
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Rewiring the EX box is almost as odious a job as rewiring the internal routing, just slightly less tedious. You still have the same problem that every time you get it wrong, you can't reuse the wire, or any of the fiddly bits, so you'd better have spare cables and fiddly bits at the outset, before you start. I seem to remember that the advice a few years ago was to practice recabling at home if you've never done it before... The word "odious" above comes courtesy of Chalo Colina, who, hint, hint, is nobody's novice bike mechanic.
It is therefore just as well to know that the Rohloff cables can stand up to a lot of abuse. Mine have been stressed for over 10K by raising the handlebars about three inches since the cables were cut to fit tightly, and I haven't replaced them, though I have spares, because my health doesn't permit me to bend over the bike for long. That's probably also a reason to use the official Rohloff cable set, rather than cheap rubbish that you can't discover is cheap rubbish until the postman drops it off. The Rohloff sets are cheap enough by comparison with roadie kits from the boutique suppliers.
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If those of you of a theoretical bent are looking for something more interesting than counting sheep while you wait for sleep, consider this question that the discussion gives rise to:
Why is it that Bowden cables are not damaged by being push-pull when the pull-pull action of the Rohloff twin-cable system is clearly superior?