I just got mine!!
I heard about the chassis/tube resonance issue...
I hear they're addressing it - all they need to do really is strap on a tube ring,
or maybe get some better damping material between the chassis and the tube
Haven't tapped to check it out yet,
but it sure sounds DAMN good thus far...
The microphonics come from inside the tubes, so there's not much that can be done about it. Another user here tried putting rings onto the tube but that didn't help the microphonics at all.