Originally Posted by
noglider
[MENTION=437412]Craigorock[/MENTION], you said you had your frame drilled. Is this tricky, or is the trick to know where it is safe to drill? Now that we know your bike holds up with 6mm (right?) holes in the BB and head lug, do you think most BB shells and head lugs can tolerate a dolt like me drilling a 6mm hole in each?
5mm holes where just big enough for my wire setup. The framebuilder I spoke with explained two options for a safe internal wire routing modification:
One option was to drill holes in the tubes and braze a reinforcement ring (like a water bottle boss) to it. This option lets you choose any placement for the cable openings, but was more work and probably would require a repaint.
The second option was to drill through a spot in the lugs. Not a lot of choice for placement but he told me this was the best way to maintain the frames integrity. It also required no brazing or painting. The builder deburred the inside/outside really well to avoid possible stress cracks.
I don't know if all frames can handle this or not. Maybe check with a local builder to be sure, as it was a very inexpensive modification.