A flexible catheter tip, comprising: an inboard understructure comprising a first continuous inboard arm understructure, a second continuous inboard arm understructure, and an inboard understructure flared head portion that connects a distal end of the first inboard arm understructure to a distal end of the second inboard arm understructure, wherein a cross-sectional width (d w, e w) of the inboard understructure flared head portion is smaller than a cross-sectional width (f w) of the first inboard arm understructure and the second inboard arm understructure; first inboard arm electrodes supported by and spaced along a length of the first inboard arm understructure; second inboard arm electrodes supported by and spaced along a length of the second inboard arm understructure; an outboard understructure comprising a first outboard arm understructure, a second outboard arm understructure, and an outboard understructure tapered head portion that connects a distal end of the first continuous outboard arm understructure to a distal end of the second continuous outboard arm understructure, wherein a cross-sectional width (g w) of the outboard understructure tapered head portion is smaller than a cross-sectional width (h w) of the first outboard arm understructure and the second outboard arm understructure; first outboard arm electrodes supported by and spaced along a length of the first outboard arm understructure; and second outboard arm electrodes supported by and spaced along a length of the second outboard arm understructure, wherein: each of the first inboard arm understructure, the second inboard arm understructure, and the inboard understructure flared head portion comprises a respective rectangular or square cross-section aligned with the reference plane; and each of the first outboard arm understructure, the second outboard arm understructure, and the outboard understructure tapered head portion comprises a respective rectangular or square cross-section aligned with the reference plane. an inboard understructure comprising a first continuous inboard arm understructure, a second continuous inboard arm understructure, and an inboard understructure flared head portion that connects a distal end of the first inboard arm understructure to a distal end of the second inboard arm understructure, wherein a cross-sectional width (d w, e w) of the inboard understructure flared head portion is smaller than a cross-sectional width (f w) of the first inboard arm understructure and the second inboard arm understructure; first inboard arm electrodes supported by and spaced along a length of the first inboard arm understructure; second inboard arm electrodes supported by and spaced along a length of the second inboard arm understructure; an outboard understructure comprising a first outboard arm understructure, a second outboard arm understructure, and an outboard understructure tapered head portion that connects a distal end of the first continuous outboard arm understructure to a distal end of the second continuous outboard arm understructure, wherein a cross-sectional width (g w) of the outboard understructure tapered head portion is smaller than a cross-sectional width (h w) of the first outboard arm understructure and the second outboard arm understructure; first outboard arm electrodes supported by and spaced along a length of the first outboard arm understructure; and second outboard arm electrodes supported by and spaced along a length of the second outboard arm understructure, wherein: each of the first inboard arm understructure, the second inboard arm understructure, and the inboard understructure flared head portion comprises a respective rectangular or square cross-section aligned with the reference plane; and each of the first outboard arm understructure, the second outboard arm understructure, and the outboard understructure tapered head portion comprises a respective rectangular or square cross-section aligned with the reference plane. each of the first inboard arm understructure, the second inboard arm understructure, and the inboard understructure flared head portion comprises a respective rectangular or square cross-section aligned with the reference plane; and each of the first outboard arm understructure, the second outboard arm understructure, and the outboard understructure tapered head portion comprises a respective rectangular or square cross-section aligned with the reference plane.