So after all my faffing with cable routing I'm having to repaint my frame anyway (the paint was starting to flake off on the ds chainstay) so now brazing stuff is back on the table.
I think going through the steerer and into the toptube via the breather hole is a bit much faff so it's pretty much between a reinforced hole in either end of the tt or di2 guides underneath it again.
I pulled the di2 guides off today and they were pretty firmly stuck, even on my crappy paint surface btw.
So after all my faffing with cable routing I'm having to repaint my frame anyway (the paint was starting to flake off on the ds chainstay) so now brazing stuff is back on the table.
I think going through the steerer and into the toptube via the breather hole is a bit much faff so it's pretty much between a reinforced hole in either end of the tt or di2 guides underneath it again.
I pulled the di2 guides off today and they were pretty firmly stuck, even on my crappy paint surface btw.