411A, I must say I'm an eager reader of your posts here and on other forums
I remember a pair of years ago you questioned someone why there were restricted weight -500 versions.
Naw, that would be too easy...for you! But I'll give you a hint....try looking at the autopilot. Interesting stories there.
Another hint: think digital (ie: other than analogue).
Now I got partially the answer.
Other than the obvious difference between the glareshields what were the main differences between digital and analogue AFCS? Why an analogue version imposed a a lower MTOW to some of ex-BA -500s?
About the outboard ailerons I believe they where moved to a 2º down neutral position in cruise flight and would react to minimize gust effects.
My father worked as an AMT for TAP. Here is a detailed main panel schematic of our old L1011s and with digital a/p:
http://www.tristar500.net/files/painel_principal.jpg
ALso if anyone is interested, the flags of the AFCS modes annunciator:
http://www.tristar500.net/files/AFCS.JPG
Best regards