• I converted my System Six (the original one) to first gen Di2 using the cable routing stickers that Shimano sell- I think it looked pretty cohesive as you really couldn’t see them. Black carbon frame tubes must have helped I am sure, but you definitely can do a neat job, and it’s much less fucking about than drilling/brazing/blasting/painting.

  • DIY drilling on a used frame would be a deal breaker for most buyers.
    Consider that if you plan on selling in future.

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