This concept consists of two stages, in the first stage we have changes only in the cabin part and the glass front of two cabins has been added and it is created from one crew with body overlap.
But in the second stage, when the entire concept of the helicopter, which includes the body and all the equipment, has been changed, all these changes have been made in accordance with the dimensions and size, as is clear in the video. As always, this concept has been applied in CATIA software.

Youtube : https://www.youtube.com/watch?v=fmjQowZjcUE&t=40s