To incorporate using the X1'21 framework part braces, a corner website link brace was redesigned as part of the framework Multi-Flex system and also functions due to the fact mounting point the separate wing mount system. The trunk link brace design allows for many battery positioning adjustments and features a convenient O-ring battery pack mounting system. The graphite back link brace may be the mounting point the side tubes and side springs, and functions as a backstop the battery pack as well.