020 Rotation Plate “020 Rotation Plate” has been added to your cart. View Cart Look inside Details Add To Cart Preview Buy (A$2.90) 020 Rotation Plate The Rotation Plate for Altered Scale 020 as found in our eBooks. The COMK Cycle of Movable Keys for music improvisation and composition. 1 pages Post navigationPrevious post: 019 Rotation PlateNext post: 021 Rotation Plate