Keith,

You are indeed making sense, but wouldn't it also need more "channels" if you also have to electronically fine tune travel of each servo of each door? For instance on the large F-15 you have a total of 7/8 doors (3 x2 for the mains and 2 up front out of which 1 is already attached to nose leg).
it make things a little more trickier to achieve using servos I guess unless I am missing something here....

Regards,
Dany