Rick, you are right ... that is a nasty habit of mine. It is irresistible to play the measures I can play at tempo, regardless (beauregardless?) of the more difficult measures which slow me down. I know that I should slow the entire thing down to the "least common denominator", but I usually get around this through practice. As I get better at the piece, the tempo discrepancies shrink and ultimately close. This time, I could not get to that point.
In the past I used my digital recorder to slow the tempo of the demonstrated piece so I could play along with it. In recent years, however, I find that I can't process it well. It throws me off ... it's just a cognitive "feature" some people have - multiple audio channels (the recorder, my own playing) can cause confusion. For instance, if you're at a party talking to someone, and you can hear the words of another conversation right behind you, that second audio channel can cause you to lose your train of thought. If I could play in unison right away, it might not so affect me. ANyway, I suppose I could at least listen to it at a slower tempo and have that tempo imprinted on my memory when I go play.
Thanks for pointing out that measure 12 error. Wow, that one was not an ability issue (though it probably would have been). No, I simply failed to notice that, and practiced it wrong the entire time, as if it were a half note.
I would not mind at all if Tarrega Estudio becomes the final, but if it does, holding that bass note will surely be something to work on, a challenge, even on a 48mm nut /615 scale guitar.
To answer your question ... after the first week of walking through all the pieces and scales, I did not return to any of the ones that weren't "exam qualifying submissions." It takes me all of my practice time (and then some) just to get to the point you see. I feel that I can't afford to spend more time on pieces that aren't part of the exam qualifying submission. In the early days of a lesson, I'm lucky if I can walk through 2/3rds of the demonstrated videos in an hour. I'm not much of a sight reader, so that slows me up - I'm always translating the notes from written form to letter form, and from letter to their location on the fretboard. It's inefficient, but I've not yet been able to skip those transition steps, at least for notes that require ledger lines. Ones on the staff, I am starting to get more quickly without the processing & translating time.