What I meant was that the wall of the tube was wide, so the hole was actually very narrow. Sorry :">
Got one thanks, but ShitBMX is way more fun :)
Actually, the answer was kinda there all along. Total bodge job, but it works :P
As Rich said, a Shimano brake outer will fit through the hole in a star nut. Only just mind (If the cable was 0.1mm wider, it wouldn't fit) - They're made to go together :P Anyway, I was contemplating this and was trying to work out how I would tension my headset, and then I remembered that you don't really need the star nut/top cap once you've tightened the stem clamp up. This is the result:
Quite happy with that for half an hour's work. It feels quite nice surprisingly. I was expecting the extra bent cable to make the front brake feel really bad, but it's only slightly stiffer than before. The only problem is that if I need to tighten the headset/change stem etc I now have to take the cable all the way out again, which is a bit annoying :P
Now I just gotta get out and learn those tailwhips :P
P.S. Note how far the steerer comes up the stem :P