It's awesome to see doors have made a return to the light helicopter but they are not available on the xH-9. It might even make more sense to have 2 sets of doors for both helicopters. One that has a slot in the bottom door to accommodate the weapon holder or bench mount, and the other for flying clean.
Also it would be acceptable to be able to add doors individually or in sets front and back, for when bench or weapon holder is available. Believe me, I would have added them myself but BIS models are off limits, so please here me out on this one. This is using existing assets so I don't see this as too time consuming work and it would help add to the helicopters DLC.
I can be more descriptive in my request if you find it needs clarification.