okay, hows this?
I did a quick test last night...had to resize the parts...but the idea worked fine.
I have added parts for simulated open venting doors.
If you want to add the partially open doors, you need only cut two
slits in the fuselage, down the sides of the marked door location
and then fit the open door part in.
You can add one, either or both doors.
The rear door is bigger and opens more so the fuselage is still visible.
For this I have added a 2D part with a visible radiator.
Just glue it in place before fitting the open vent door.
