This is what I am hearing: The grommet to screw shank/tone bar fit, both inside and outside dia, (screw shank and tone bar contact) are even their float vs. isolation in regards to fork movement (blow response and recovery) after a hammer blow. In other words, not only is the fit good, but the rebound properties of the rubber is right. The response is optimal. The tone bars are jumping well to players touch, yet there is balance/smoothness. It seems that the grommets have just the right memory and make up. The forks have good velocity response (movement) and sustain. It's not just about voicing the tines and pick ups.
What we are hearing are harps (and hammer tips) that have good voicing quality/float properties. The player is taking advantage with what is available. It's fun to play a Rhodes when it's responding well.
It has always been the bane of a tech to have access to the right grommet. (springs as well)
Tighter you get more smoothness, looser you get more to the funky side. You want just the right amount of float/balance. These Rhodes have it. It's something to always be aware about when working on a Rhodes. A lot of guys miss it.
After awhile you can tell what any Rhodes is doing, even from a recording. Those tone bars (harps) are floating well, I like it.
I imagine those are the new grommet/screws. I have a set. I can't wait to use them.