Just musing over this issue and comparing with a new sofa we bought that my partner found a little too soft after a while. I wonder if the CX series seats need some extended use before they adapt to a particular body shape. With age both myself and partner suffer from back pain at times, so a firm seat back with good lumber support is always preferable. That's why I had Allon White fit inflatable lumber supports to my standard Classic seats.
Inflating bulb can be seen here on outer edge of seat.
![[Linked Image]](https://i.imgur.com/HHf1ZHN.jpg)
I believe CX seats have similar.