- alternative screen interface, Untouch: https://github.com/trebb/untouch . Should work for Kawai CA98 and NV5/NV10 as well. See http://forum.pianoworld.com/ubbthreads.php/topics/2820984/all/diy-replacement-for-touchscreen-kawai-nv10.html for pictures.
- reverse-engineer the serial communication between mainboard and touchscreen: https://github.com/trebb/untouch
- reducing let-off K-300 ATX3 https://www.youtube.com/watch?v=ZdxQ3DLI198
- key weight needed to make middle C sound: 81 grams (compare: https://www.sweetwater.com/insync/keyboard-action-and-key-weight-experiment/ )