[mirwa]

If you paid someone to do that, irrespective if they are a luthier or not, the obligation is on them to fix it.

We don’t fit endpin jacks with drill bits we use reamers, for the exact reason as shown in your picture.

This indicates the person who fitted the system was not qualified enough to do said process, therefore the obligation falls back on management of said business for using an inexperienced unqualified person to undertake the paid task.

Steve