Hi arpom.

1) I believe it is.
2) Reload the 727 to bring the sounds back (known bug). I have assigned the keyboard command CTRL+SHIFT+R to Aircraft (reload), so it only take a couple of seconds to reload the aircraft.
3 & 4) I don't know the answers to these ones.
5) It could be easier to have a click spot that makes the yokes hide/unhide (as it is in the CS 707).

Mark