I think a hole would be fine. Steerers don't fill up the headtube, there's space around it for a wire to fold
who was it on here that had DIYed such a system on a blue cielo.... i can't remember.
Jaap
https://www.pedalroom.com/bike/cielo-road-racer-disc-21924
@Glws started
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I think a hole would be fine. Steerers don't fill up the headtube, there's space around it for a wire to fold