My seat bottom will have three layers consisting of green, blue, and pink Confor foam, with a total thickness of about three inches. The back will have two layers consisting of blue and pink Confor foam with a total thickness of about two-inches.
To provide clearance for the seat foam height with the back adjusted to any position, I modified the seat back by shortening the lower seat back panel about 2-1/2”.
This is certainly not a necessary change. It just keeps the bottom cushion from be in compressed by the seat back.