The evolution of Digital Musical Instruments (DMIs) has pushed the boundaries of musical expression and interaction. These instruments leverage advanced technologies to offer new dimensions of creative possibilities. This paper investigates the musical possibilities of Bodyharp and the Teinophon, each designed to go beyond the limits of traditional instruments. We aim to uncover new perspectives on performer interaction and mapping, using the capabilities of these instruments to surpass traditional stringed instrument boundaries with their infusion of sensor-based technologies. The study focuses on crafting and analyzing inventive mappings that connect the performer's gestures to sound, extending digital musical interactions beyond traditional instrument techniques dictated by physical and acoustical limitations. We explore uncharted sonic territories, drawing inspiration from the instruments' familiarities, yet extending them to create unique musical interactions. Through qualitative and performance-based examination of the interaction between body movements and sonic outcomes, we identify mappings that offer the most compelling and engaging results. This research recognizes the personal nature of musical preferences while encouraging creative exploration following a workshop-style evaluation method. We collected data from eight participants based on their experience with exploring both instruments' affordances and with solo and collaborative performance practices. Our work contributes to the broader discussion on sensor-based instruments, providing insights into their potential for expanding musical expression beyond established norms. By sparking further innovation and exploration, we hope to deepen our understanding of the creative possibilities embedded in Bodyharp and Teinophon, thus paving the way for new dimensions in contemporary musical expression.