A new SI for the CC11 just popped up SI0037. It appears to be a solid seat replacement for the existing aft sling seat, but only for the CC11 aircraft. There is no explanation for the SI and it is "optional and not required". Of interest there does not seem to be an SI for EX/FX aircraft that, I think, use the same aft seat.
Anyone have more details? Will new aircraft come with a solid seat?