Sorry, just to clarify for my own records and anyone else reading,

  1. I went to the TRACK TRIG EDIT menu by hitting FUNCTION + BANK while Grid Recording was on
  2. Scrolled through the PATTERN PAGES to find the hidden recorder trig
  3. Held down the TRIG key while tapping both the RECORD buttons and the MIDI button for good measure, until the REC. TRIG was removed from the display