Using Odoo v13 enterprise.

I have only just started looking into this, but I thought I would check if anyone already had experience trying this. The Gantt View allows a day, week, month, or year 'scale' to be selected but it would be nice if I could add a two or three day 'scale' to the Gantt View. I know that this is set in JavaScript (with enums if I remember right) but I am not quite sure where the actual date range part is and how to add new scales.

Thanks.