Primary muscles used during arm Balances

I'm attending a workshop today on this topic and this was my homework
  1. Deltoids
  2. Serratus anterior
  3. Pectorals
  4. Lattisimus dorsi
  5. Rotator cuff
  6. Triceps
  7. Small muscles of hand and wrist
  8. Hamstrings
    Specifically thinking of handstand here
  9. Abdominals