ATK worked flawlessly the very first time with my working K3. I couldn't get it to work at all with the bricked one. I was getting the same error from the screenshot in page 5. Were you? I came to two conclusions. One was that the battery wasn't charging, but I charged mine for nearly two whole days on AC and I still got the error. I didn't bother with the swap but you tested that. The other conclusion was that the mmc was totally fried. I never got around to building a serial cable to check any output from uboot. You see no output at all which supports the totally fried mmc conclusion. I boxed mine up and sent it back to the mother ship yesterday.