1. Change the sustain dowel to a longer pin. Just remove the sustain guide cup. 
  2. Install a Vintage Vibe Stereo Vibe preamp and add 4 or 5 pin cable to cart.
  3. Place top piano on top of speaker cabinet, mark where guide cups are located, then add glides to the underside of top piano to hold in place better.
  4. You may or may not want to remove your leg plates.