"Filla" idea. L hand does movements striking "ka" while R hand plays 16th-note "don". (Fixed tones keeps the hands very distinct... can blur this later for surprising effect.) "Path length" arrangement strategy: long and slow -> short -> long and fast (this probably involves spins and R hand will have to miss some 16th-notes.)
Wrote draft of beginning and end of "First Filla".
Next: review and complete.