You would be moving the bushing (ferrule) north rather than south as the goal is to keep the driven gear from being mashed into the worm gear by the string tension. But that’s the hard way. Instead, move the tuner itself .25 mm +/- south.
Some installation methods use two hole sizes in the headstock, one for the ferrule, and another for the tuner shaft. It is often necessary to increase the size of the 1/4” hole for the tuner shaft or it will not allow the tuner to shift south. 5/16 is more than enough to do the job. The screw hole need to be filled and re-drilled about 1/2 their diameter south as well. Cocktail toothpicks with about half of their pointy end clipped off and a bit of Titebond work well for that. Some other manufacturers of Butterbean tuners use tighter tolerances and avoid the problem altogether.
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