About the option of 2 crewmen to ride 'hangin on' to the side of the helicopter.
It actually is realistic as for one the Royal Netherlands Airforce (my 'boss' ) has already been experimenting with this concept.
The idea behind this is to be able to do a casevac of the crew of another downed apache (or any other helo for that matter)
I couldn't find a good picture of it, but it sure is realistic
Other than that, I'm anxiously waiting for the final version of your awesome Apache
Best Regards,
Jan