Todays update will give you a 504 error, you will only be able to use the 2 free modules.
if you have updated its reported that if you revert to an earlier version you still get the 504 error
With the F14 i was having a hard time AAR because the normal view you had next to no reference with the refueler, then i lowered the seat until it would not lower anymore, found that made it easier, no need to go to bomb mode just leave it in auto