Dear Grorom,
hey, you got your Max Lumi back. Hooray!
I should something similar like this to get the boot.img. I haven't tested it yet.
Code:
adb shell dd if=/dev/block/by-name/boot of=/sdcard/boot.img
adb pull /sdcard/boot.img
I'm waiting for firmware version 3.2. These five favorite brushes in notes will help a lot.