@StevePeel I feel your desire for cable routing. If there's one thing I now wish I'd sorted on the custom frame I had built in 2010, it would be good soultions for lighting routes. Like the wire-free contact-dropouts method, or just very neat routing.
If I were you, I'd invest in some red Sugru for the frame, black for your forks/rack, and use cableties to hold the wires where you want them (hairdrier to get them soft to straighten out kinks, maybe?), and promise yourself you'll let the Sugru set properly.
Also: why not route down the downtube instead of toptube? Much less unsightly.
Of course, drill your frame or whatever you want, but maybe try the best fix you can before compromising your nice frame.
@cornelius_blackfoot Seems @Greenbank has answered your question.
@StevePeel I feel your desire for cable routing. If there's one thing I now wish I'd sorted on the custom frame I had built in 2010, it would be good soultions for lighting routes. Like the wire-free contact-dropouts method, or just very neat routing.
If I were you, I'd invest in some red Sugru for the frame, black for your forks/rack, and use cableties to hold the wires where you want them (hairdrier to get them soft to straighten out kinks, maybe?), and promise yourself you'll let the Sugru set properly.
Also: why not route down the downtube instead of toptube? Much less unsightly.
Of course, drill your frame or whatever you want, but maybe try the best fix you can before compromising your nice frame.