A trainer type with a lot of dihedral still doesn’t require rudder (and ailerons) held in a coordinated turn. It will only tend to roll wings level if a sideslip into the turn develops. This inevitably is the result of not enough elevator held in the turn causing a slip to the inside. If the wings are banked, and elevator is applied, there is normally no need to hold aileron and rudder during a turn, even with a trainer.