Hmm... I see that I may have made a faulty assumption based on yifanlu's thread on using 3.1 with the K2 and DX. (
https://www.mobileread.com/forums/sho...d.php?t=127969) I do have a working K3, but with more thorough reading, I see that the DX must generate the update file, which is processed on the K3. And with a bricked DX that is not going to fly...