After playing of a lot of chairs with different comfort I use a piano stool too. In addition, I use a slightly harder pillow. I can sit relaxed for a relatively long time. I use a guitar support, so the body weight distributes a little bit better anyway than with the footstool.
"Don’t try to calm the ocean. Learn to swim between the waves."
Boguslav Teryks Doubletop. spruce-cedar
Hanika 1A/PF, spruce
Ramirez 1a, 1972, cedar