OK. Awesome video, and awesome model.
BUT . . . I'll disagree with only one minor point:
"You've never heard sound like this from N scale"
Yes, I have.

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(cat meows extra)
etc.
Seriously, though - great job on this. This is the kind of envelope-pushing at the manufacturing level that I was hoping to inspire with my one-off sound conversions, and I'm tempted to buy one even though it would be slightly out of place on my 1957 NKP layout . . . Aw, heck, I will anyway. After all, I went ahead and bought a bunch of FVM NS Heritage units with no sound at all . . .
John C.