I have an idea that could improve ROI on the D3, but i don't have a D3 to test on. Will someone who has a D3 do the following and send me the files?

nanddump -f /initramfs.bin.SD /dev/mtd8
nanddump -f /am335x-boneblack-bitmainer.dtb /dev/mtd6
nanddump -f /uImage.bin /dev/mtd7
nanddump -f /u-boot.img /dev/mtd4

You can use an application like winscp to get the files off of the miner. The miner uses a ramdisk, so these files will disappear on reboot so you don't have to worry about storage space.