* Re-tsu:

Sooner or later, you're either going to make a second mistake, or you're going to repeat the previous process. Doesn't matter. Before you continue braiding, NAME the first mistake "Ai"... Say it as if you're training Aiki right now! say "Ai!" {you can even shout out it like "Aa-a-a-yi!" with all your lung's might at "a-yi!", and increasing "aaa")

  One mistake, one KNOT  {on a random side of the Humi)
  One Glyph: Ai (A/a or Aa/aa, short A)
  One Gesture: {up-left, to, down-right} hand opened as if chopping.
    Meaning:
    "Ou..." "ah!", "Owye!", "I say,... is ...", etc.

After some more braiding, and your impetuous "Ai!" battle cry (if retsu-do.ing, always check for people nearby ;)), Wait for a second, meditate, fix your breathing (you shouldn't be breathing w/ ?presekulki? interruptions and breath-holding)

Then braid out a "Ki" inside your Himu:

  One mistake on a random side & one mistake on the other
  One Glyph: Ki (K-hh-yi, "khi")
  One Gesture: {up-left, down-right, up-right} hand opened as if chopping.
      Meaning: "Matter/Energy/Inner/Outer Force?... my ass..." 
      Ki means many many things with your _intent_ in mind
      "Does", "Do", "Doing", "This", "this-doing", "this-does?", "what?", "what is that?" "Queee?" "ke-pasa"

Continue braiding without any mistakes for now. Increase your technique, when you feel ready, BRAID out a DO (method, The Way, way, Way) Random. Opposite. original side.

Now you're ready. For Kimu-retsu-do (or mindful Aiki)

Once you catch the basic Language you can "upgrade it" with combinations of knitting and mistake knots.