A few more points on rudder use.

A well trimmed airplane generally needs right rudder to track through inside loops. It also needs left rudder to track through outside loops.

While you follow the ailerons with the rudder while in an upright turn, you use opposite rudder to coordinate an inverted turn.

Most acrobatic designs strive to have no coupling between the rudder and rolling. This is controlled by the wing placement and the amount of dihedral in the wing. More dihedral will cause rolling the the direction of the rudder, while not having enough dihedral will cause proverse roll coupling. In other words, right rudder causes the airplane to roll left.

The old rudder/elevator designs rolled left with left rudder. When upside down, left rudder usually also caused them to roll to the left (even though left rudder when upside down is hanging off to the right).