BUILDING ON OUR PREVIOUS APRA WORK WE PROPOSE TO ADVANCE THE CAPABILITIES OF CDZNTE BAR DETECTORS FOR USE IN FUTURE MEDIUM ENERGY .-RAY MISSIONS. THE LARGELY UNEXPLORED MEV ENERGY RANGE OFFERS GREAT POTENTIAL FOR ASTROPHYSICS DISCOVERY INCLUDING ASPECTS OF NUCLEOSYNTHESIS MULTI-MESSENGER/GRAVITATIONAL WAVES JETS AND COMPACT OBJECTS. THIS FIELD HAS BEEN CONSTRAINED BY LOW CROSS SECTIONS HIGH BACKGROUNDS AND LIMITATIONS IN TECHNOLOGY.