I'll add a wish that there would be an expansion for the 707-320 with the JT4A turbojets with organ pipe exhausts. And it might be silly, but a classed interior more reflective of early 1960s 707s couldn't hurt either.

Thanks to the sceneries and ai traffic available at California Classics, I spend a LOT of time flying the 707 in the 1960s, usually for Pan American or TWA out of Ildewild or LAX.

And I'm not sure I'd use it, but a -400 International would probably get the attention of a lot of european simmers.