BG7QVU Just go straight with the 6-meter shortwave receiver; it's also easier to use once you've upgraded to B mode.
BG7PXE BOX-6 has been produced in small batches. If you are interested, please contact the original designer, "Jian Shang Ben Shang," directly. I plan to create a separate tutorial on BOX-6 assembly (咕咕咕).