One further point re. CWS. On the L1011, it was able to capture and maintain the dialled-up Alt/FL. That being so, it became a useful tool in turbulence for holding patterns since it had a higher bank angle limit than the A/P - (from memory) 38 degs as against 25.. .It also, of course, was part responsible for the Everglades crash, coupled with the lack of Alt deviation warning.