Hi!
Sorry to say this, but the "nand-stat-install" script is nuts.
I looked at it and would like to rewrite the script, but at the moment I'm trying to capture exactly what was done there.
I only have boards with SATA that I can test. And I do this in my limited free time.
My tip! If you want to change it in a running system, don't try the "nand-stat-install" script, do everything manually! This is the better and safer solution!