"I would practice them in groups of 5 notes, so, from beat 1 to the first note in beat 2, then from beat 2 to the first note of beat 3 etc. then once you've got through the bar go from beat 1 to the first note of beat 3, and beat 3 to the first note of the next bar. Practice each 5 note group a number of times before you move on to the next one, or try to connect two groups.
Also apply the rotational idea that birba shows for bar 13 in his second video..
take the first beat of bar 12.. you will rotate toward the right for the A#, toward the left onto the g#, back to the right on the B, then left on the Cx, and right onto the E. The rotation to the right can be a little more pronouced to produce the accent on the A# and then on the E, but it should feel very 'free' and loose in that you don't have to conciously apply downward force with your arm (more of a controlled free fall). You can reduce the accent as you see fit when you become more comfortable with the motion."
AJ: So once I've practiced them in groups of 5 notes, will I play them the same way? Instead of playing in groups of 4 notes? It sounds like your suggestion is to practice them in a similar fashion to bars 13 onward, the method that Birba suggested - rotation or oscillation of the wrist. Should I also apply the exercise that Birba had me do to them? You know, hold the first note, then play the next 3 quickly, palms relaxed.
You use the term semiquaver. Are you in the UK or Australia? We used those terms in Malaysia.
Thanks, AJ, for your tutoring. I appreciate your help very much.