I would rather have a known good rack than mess with it for 5 minutes to try to get a good rack and not have a thin cloth on the table. The issues that a loose rack causes are way worse than what a ball rolling off 3 mm would cause if a slow rolling ball hits the edge of the rack. Just think of it as where that ball would have randomly gone anyway if it hits the rack.
I agree completely! I really don't understand being against templates, especially for the reason that a ball might move slight off course from its random path.
