Originally Posted by
ehcoplex
There are a few other options to think about- there's a cable guide that clamps to the stem, I think Velo Orange sells one. Maybe not quite as out-of-place looking as the Tektro guide... You could also drill a hole in the 'reach' part of the stem... A little bit tricky, and no doubt there are those who would wail that doing so is courting death, but pretty clean.
not from me: that's an often-used technique and if done correctly there's very little danger to the stem.
Correctly for me means chucking the stem at the correct angle in a vise and using a drill press to first drill the thin (2mm or so) hole for the cable and then the larger 4-5mm "countersink" in the top for the cable housing end, following the thin hole as centerguide.
Try to do this without a drill press and vise is asking for trouble, IMO