And, added to the takeoff configuration warning.
Correct and like the takeoff warning system the elevator jam system is inhibited in flight.
Yup, quite correct.
No all had ACS either.
And some had different MTOW's.
Early -500 were delivered without active controls or the extended wings, these were all later retro fitted. Without active controls the MTOW was limited to 496K.
While there are several different MTOW's available for the -500's with active controls (504K, 510K, & 516K) structurally they are all the same, as it requires manual changes only.