While you lose the indexed adjustability, you could consider finding or machining a small nut that, once you adjust the cable adjusting bolt, you tighten against the caliper to keep the bolt from moving.
@MileEater started
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While you lose the indexed adjustability, you could consider finding or machining a small nut that, once you adjust the cable adjusting bolt, you tighten against the caliper to keep the bolt from moving.