It's bizarre how long things take sometimes.
My life has been really unstable this year, so all the elements necessary for me to focus and do this hack didn't come together till this week. After a reasonable amount of study and just a little failure, I succeeded to type on e-paper tonight, after four and a half years of wanting to. Bless all of you who helped make this happen.
My only difficulties were with slight lack of clarity in the instructions and making USB over ADB work (part of Minimal Touch beta-5 XU[sb] Part 1). I gave up right away on USB, did a factory reset, and reinstalled Minimal Touch beta-5 XW[ifi]. Everything went fine from there. No doubt a factory reset was overkill, but I wanted to be sure to start from scratch. The keyboard worked without a hub the first time from the instructions on the
wiki at xda.
Now I just need to make a dvorak keymap and get the hub working to protect the battery of the device. Then make even clearer instructions as originally promised.