<r> Poland officially bought the F-35, they could be added as a hypothetical future units for now. I`m not allowed to post links yet so hers a quote:<br/>

<QUOTE><s>[quote]</s>WARSAW, Poland — Polish Defence Minister Mariusz Blaszczak has signed a contract worth $4.6 billion under which the ...

Hi, to my knowledge and experience in CMANO yes, if you put external storage on to for example F-35/F-22 it will be more visible/vulnerable to enemy sensors.
Not 100% sure about opening the bomb doors factor, pretty sure other users can confirm/deny if this is modeled.