Umberto,
I recently installed PMDG 737 NGXu on my rig. I did not remove the old NGX. so both planes co-exist. During my first flight with NGXu, I noticed that the fuel truck supplied for it is always the "small" non-animated truck whereas I can get the tanker truck or the animated underground refueling truck for the old NGX at the same stand and airport. I even tried to manually check the box "Underground Refueling" for that stand (or any stand that I tested). Still the same problem. I am up to date with GSX/Level 2, as well as P3D v4.5 and both NGX and NGXu. Does this happen to anybody else? Is there a cure for this problem?
Thank you.
--Nazmi