Awesome project. The main difference I can see is that the solenoids on Disklaviers are very quiet. I've got a mid-80's U3 Disklavier I bought a couple of year

Awesome project. The main difference I can see is that the solenoids on Disklaviers are very quiet. I've got a mid-80's U3 Disklavier I bought a couple of years ago, one with a floppy disk controller. It was about £4k, bought it from a dealer who imports them from Japan. I love it - the strings are longer than a standard upright, but doesn't take as much space as a baby grand. I only have one wish for it - that someone would make a new ( ideally open source) controller unit that works with old Disklaviers! The unit has midi I/O but has about 500ms of latency on playback - still very nice as a party trick and for recording ideas - but somewhat limits the usability with a sequencer. Still, it's pretty mad I am using a Japanese robot piano from nearly 40 years ago that still works exceptionally well.